West Gate, dating from the 14th century, the only surviving city gate, Canterbury, Kent, England, UK

Last remaining cedar forest covering only a few hectares, Cedar Forest, Lebanon, Middle East

Ahu Tongariki, the largest ahu on the Island, two of the Tongariki row of 15 giant Moai statues, only this one still has a topknot in place, Rapa Nui (Easter Island), Chile, South America

First Congregational church, Paul Revere Bell, one of only 37 surviving bells made at Revere's foundry during his lifetime, Woodstock, Vermont, New England, USA, North America

Filfil, only rainforest area in Eritrea, Africa

Views of the town of Stanley, the capital and only true city (with a cathedral) in the Falkland Islands, South Atlantic Ocean, South America

Views of the area just outside of Stanley, the capital and only true city, with a cathedral, in the Falkland Islands, South America

The Falklands Conflict War Memorial in Stanley, the capital and only true city (with a cathedral) in the Falkland Islands, South America

The Falklands Conflict War Memorial in Stanley, the capital and only true city (with a cathedral) in the Falkland Islands, South America

The Falklands Conflict War Memorial in Stanley, the capital and only true city (with a cathedral) in the Falkland Islands, South America

Zion Lodge, the only lodge in Zion National Park, Utah, United States of America, North America

Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, Rapa Nui (Easter Island), UNESCO World Heritage Site, Chile, South America

Views of the Signpost just outside of Stanley, the capital and only true city in the Falkland Islands, South Atlantic Ocean, South America

Grand Canyon view from the Tanner Trail with only the twilight glow as the light source, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The 700 year old Papa Batu, the only stone roofed tongkonan house in Toraja, south west of Rantepao, Tummake, Toraja, South Sulawesi, Indonesia, Southeast Asia, Asia

The 700 year old Papa Batu, the only stone roofed tongkonan house in Toraja, south west of Rantepao, Tummake, Toraja, South Sulawesi, Indonesia, Southeast Asia, Asia

Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, backlit by moonlight, Rapa Nui (Easter Island), UNESCO World Heritage Site, Chile, South America

Golden Labrador swimming with only head out of the water, United Kingdom, Europe

View of the Ratinger Tor, a customs gate built between 1811 and 1815 in the classicist style, the last built and only remaining city gate, Dusseldorf, North Rhine Westphalia, Germany, Europe

View of the Ratinger Tor, a customs gate built between 1811 and 1815 in the classicist style, the last built and only remaining city gate, Dusseldorf, North Rhine Westphalia, Germany, Europe

Ahu Ko Te Riku at Tahai, the only moai (statue) with restored eyes, Easter Island, Chile

St. Peter's Church, built in the 12th century, one of only three churches in Sussex with a round tower, Southease, near Lewes, East Sussex, England, United Kingdom, Europe

St. Peter's Church, built in the 12th century, one of only three churches in Sussex with a round tower, Southease, near Lewes, East Sussex, England, United Kingdom, Europe

View of the Ratinger Tor, a customs gate built between 1811 and 1815 in the classicist style, the last built and only remaining city gate, Dusseldorf, North Rhine Westphalia, Germany, Europe

The 12th century 150 pillar Dev Somnath temple, the world's only temple made of stone with no sand or lime packing, Dev, Rajasthan, India, Asia

Only known statue of King Tutankhamun and wife, Luxor Temple, UNESCO World Heritage Site, Luxor, Thebes, Egypt, North Africa, Africa

The summer only former fishing village of Mastad, on the island of Vaeroya, Norway, Scandinavia, Europe

The summer only former fishing village of Mastad, on the island of Vaeroya, Norway, Scandinavia, Europe

Couple entering the 12th century 150 pillar Dev Somnath temple, the world's only temple made just of stone, Dev, Rajasthan, India, Asia

The summer only former fishing village of Mastad, on the island of Vaeroya, Norway, Scandinavia, Europe

White clouds in blue sky

Guano in an Adelie Penguin, Pygoscelis adeliae, colony at Madder Cliffs, Suspiros Bay, at the west end of Joinville Island, Antarctica. Adelie's are a true Antarctic species which are suffering as a result of climate change, The Antarctic Peninsular, their only breeding grounds, is one of the fastest warming areas on the planet. This is causing Adelies to migrate south. They are reducing in numbers, they feed almost exclusively on Krill, which is also declining as a result of climate change.

Sunset taken from the ferry, which is used by whale-watchers to cross Bay of Biscay, SW Europe. (A4 only).

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

The Moon in mid-total eclipse, on January 20, 2019, with it shining beside the Beehive star cluster, Messier 44, in Cancer. This was the unique sight at this eclipse as it can happen only during total lunar eclipses that occur in late January. There was one on January 31, 2018 but the next will not be until 2037.

Comet Hartley 2 near the Pacman Nebula, NGC 281, in Cassiopeia. Stack of 4 x 6 minute exposures at ISO 1600 with Canon 5D MkII on A&M 105mm apo refractor at f/4.8 with Borg reducer/flattener. Bright star is Alpha Cas, Schedar. Autoguided with Celestron NexGuide autoguider. However, image of comet core is from only one exposure to minimize trailing from this fast-moving comet.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Comet NEOWISE (C/2020 F3) over some of the eroded hoodoo formations at Dinosaur Provincial Park, Alberta, July 14-15, 2020. A faint aurora is at right. The foreground is lit by starlight only; there was no light painting employed here.

Palms and old pier in Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

The region of the Milky Way in Puppis and Vela encompassing the vast Gum Nebula, a photographic object only. Sirius and Canis Major are at right; Canopus in Carina is at bottom. The False Cross and the open cluster NGC 2516 are at left.

The only source of income, eggs from the Megapode bird. One egg costs 2 Kina, about 50 Eurocents, at the market. Tavurvur Volcano, Rabaul, East New Britain, Papua New Guinea, Melanesia, Pacific

The only source of income for people on Matupit island are the eggs from the Megapode bird, a small bird, that lays massive eggs in the hot volcanic ash and trusts the volcano to incubate them. One egg costs 2 Kina, 50 Euro cent, on the market, Tavurvur Volcano, Rabaul, East New Britain, Papua New Guinea, Pacific

Two children fishing on rowing boat at beach of lake Simssee, Chiemgau, Upper Bavaria, Bavaria, Germany

Woman on a Swing with Mountain View and Sunlight over Lake Lugano in Morcote, Ticino in Switzerland.

World's only boat tour in a 1986 Cadillac stretch limo, NAUTILIMO, Islamorada, Florida Keys, Florida, USA

Miniature harbor and Saxony's only lighthouse at the Fasanenschlösschen near Moritzburg Castle, Saxony, Germany

Dawn atmosphere, mist-covered Hegau volcanic range, with only the highest peaks Hohenhewen and Hohenstoffel exposed, Swiss Alps in background, Hegau, Baden-Wuerttemberg, Germany, Europe

A mountain rescue technician is descending into a crevasse. When a skier breaks through the snow and tumbles down the glacier, the only way out is being winched out by the rescuers of Air Zermatt.

High Mountain Rangers Tom Ditola and David Weber are taking a rest on the West Rib on Mount McKinley, Alaska. Mount Hunter in the background. They are above the clouds in blue sky and the sun is shining. Mount McKinley, native name Denali, is the highest mountain peak in North America, with a summit elevation of 20,321 feet (6,194 m) above sea level. At some 18,000 feet (5,500 m), the base-to-peak rise is considered the largest of any mountain situated entirely above sea level. Measured by topographic prominence, it is the third most prominent peak after Mount Everest and Aconcagua. Located in the Alaska Range in the interior of the U.S. state of Alaska, McKinley is the centerpiece of Denali National Park and Preserve. Every climbing season High Mountain Rangers of the Denali National Park Service are called to help climbers in need. If possible the patient is brought down to base camp on foot, only in life threatening conditions a helicopter is called to evacuate the patient to a hospital in Anchorage.

Mountain ranger Brian Scheele on this way to Windy Corner on Mount McKinley, also know as Denali, in Alaska. He is pulling a sled, that together with his heavy backpack is containing all the gear like tents, clothing and food. Every climbing season High Mountain Rangers of the Denali National Park Service are called to help climbers in need. If possible the patient is brought down to Basecamp on foot, only in life threatening conditions a helicopter is called to evacuate the patient to a hospital in Anchorage. Mount McKinley, native name Denali, is the highest mountain peak in North America, with a summit elevation of 20,321 feet (6,194 m) above sea level. At some 18,000 feet (5,500 m), the base-to-peak rise is considered the largest of any mountain situated entirely above sea level. Measured by topographic prominence, it is the third most prominent peak after Mount Everest and Aconcagua. Located in the Alaska Range in the interior of the U.S. state of Alaska, McKinley is the centerpiece of Denali National Park and Preserve.

Kushti is a traditional form of South Asian wrestling popular in India, also known as Pehlwani. Wrestlers usually meet in an Akhara, a "wrestling ground" which is a place of practice, with facilities for boarding, lodging and training.They serve both as training schools and an arena for wrestlers to compete against each other. Akhara is not limited only to physical activities, but also involves religious practices, particularly the worship of the god Hanuman.

Kushti is a traditional form of South Asian wrestling popular in India, also known as Pehlwani. Wrestlers usually meet in an Akhara, a "wrestling ground" which is a place of practice, with facilities for boarding, lodging and training.They serve both as training schools and an arena for wrestlers to compete against each other. Akhara is not limited only to physical activities, but also involves religious practices, particularly the worship of the god Hanuman.

A mountain ranger is digging out tents after a snowstorm covered them during the night in 14k camp on Mount McKinley, Alaska. Climbers are advised to spare no expense on a expedition-quality tent as it can mean the difference between life and death during a ferocious storm on Denali. Extra poles and repair materials are important in case of damage caused by storms. Plan to take extra pickets, wands or deadmen for tent anchors. Never leave a tent without anchoring it securely. Tents are lost each year due to sudden gusts of wind while the tent was left unattended or drying. Every climbing season High Mountain Rangers of the Denali National Park Service are called to help climbers in need. If possible the patient is brought down to base camp on foot, only in life threatening conditions a helicopter is called to evacuate the patient to a hospital in Anchorage.

Cowboy Sitting On His Horse

Man Running In The Water

Girl In Canoe

Girl Sitting By A Statue, Puerto Vallarta, Mexico

Lake Of The Woods, Ontario, Canada; Girl In A Canoe

Girl Standing On The Beach

The Huge Port Building Of Canada's Only Arctic Seaport, Churchill, Manitoba, Canada

Hawaii, Big Island, Kohala, Mauna Lani Golf Course, 7th Tee, Honokaape tee off, view from behind man swinging A18A. EDITORIAL USE ONLY.

bobcat total view of bobcat standing on rock in front of blue cloudless sky one animal only outdoors horizontal format

Woman in swimming pool, St. John, US Virgin Islands

Blue sky with clouds

Golden langur, or Gee's semnopithecus;Trachypithecus geei), lookink for food in a tree, Manas National Park, Assam, India

Hiker contemplating the Lac du Lauvitel (1530 m) on the GR 54 long-distance hiking trail, Tour de l'Oisans et des Ecrins, Veneon valley, Ecrins National Park, Isere, France

Young girl dressed in a pink fuchsia dress with ruffles and veil, white hijab. In the late afternoon, children from a small village come to play by the sea, a beach of white sand and turquoise sea on the east coast of Zanzibar, Tanzania.

Little boy dressed in an abaya, light gray jdellaba and wearing a golden kofia, trying to drink water from a bottle. In the late afternoon, children from a small village come to play by the sea, a white sand beach and turquoise sea on the east coast of Zanzibar, Tanzania.

Portrait of a little boy wearing an orange abaya and a black and gold kofia, hiding behind a wooden pole. In the late afternoon, children from a small village come to play on the white sand beach and turquoise sea on the east coast of Zanzibar, Tanzania..,

Young girl wearing white dress with pink ruffles and veil, white hijab. In the late afternoon, children from a small village come to play by the sea. White sand beach and turquoise sea on the east coast of Zanzibar, Tanzania.

Humpback Whale (Megaptera novaeangliae), close to the Antarctic Peninsula during late summer. Polar Region, Southern Ocean, Antarctic Peninsula

That Wanaka tree, Wanaka lake, Otago, Southern island, New-Zealand

King Penguin (Aptenodytes patagonicus) chick on beach in the Falkland Islands in the South Atlantic. South America, Falkland Islands, Saunders Island

Giraffe (Giraffa camelopardalis) drinking at waterhole in Kruger National park, South Africa

Giraffe (Giraffa camelopardalis) bending down to eat grass in the barren landscape of the Etosha pan, Etosha National Park, Namibia

Lineated Woodpecker (Dryocopus lineatus) adult female looking for larvae on a trunk against a blue sky, Costa Rica

Roadside Hawk (Rupornis magnirostris) adult on a branch observing its territory, Costa Rica

Pilot whale (Globicephala macorhynchus) on surface. Coast of Punta Rasca. Tenerife, Canary Islands.

Cinereous Harrier male in flight, El Calafate Argentina

Portrait of Polar Bear swimming, Hudson Bay Canada

Puma jumping from a rock, Utah USA

Brown Bear and volcano at dawn, Kuril Lake Kamchatka Russia

Lammergeier in flight, Swiss Alps

Blue tit on a branch, France

Indian peafowl in flight under a blue sky

Komodo dragon on a beach, Komodo Indonesia

Puma jumping from one rock to another, Utah USA

Polar Bear swimming, Hudson Bay Canada

Polar Bear feeding on remains of Beluga, Hudson Bay Canada

Eurasian Sparrowhawk on falconer glove, Burgos Spain

Mute Swan in flight in winter, GB

Ghost crab on beach, Haapai Tonga

Going out in traditional clothes on the occasion of the Naadam festival, the national festival which celebrates today in Mongolia the independence of Mongolia from China, Steppe, Eastern Mongolia, Mongolia, Asia.

A technician goes into a raised square building on an orange metal structure. An Italian technician specialising in radio and telecommunications goes into the shelter that houses the VSAT antenna, the device that connects the station to the Internet by satellite. This is the station's only link with the outside world. Most of the buildings are elevated to prevent the formation of snowdrifts caused by wind-blown snow. Concordia Antarctic Research Station, Dome C plateau, East Antarctica.

Puma on a rock, Utah USA

The Basler, stationed on the Terra Nova Bay ice floe in front of the Mario Zucchelli base. The mechanics take advantage of a rare lull to carry out routine maintenance. The aircraft is strapped to the ground. A squall arrives from the left. Victoria Land, Antarctica

A German BGR helicopter used in Terre Victoria to transport geologists to specific research points. These are one-off scientific programs, involving the collaboration of several countries, in this case Germany and Italy. The Germans set up a base camp several dozen kilometers from the Italian Mario Zucchelli station, using Italian logistical resources such as the Laura Bassi icebreaker to transport the helicopter, the equipment needed to set up the base camp, scientific equipment and, of course, personnel. All of this was delivered to the Mario Zucchelli station for onward transport by helicopter to the search site. Victoria Land, Antarctica