House on Fire Ruins, Anasazi Culture, over 800 years old, Mule Canyon, Cedar Mesa, Utah, United States of America, North America

House on Fire Ruins, Anasazi Culture, over 800 years old, Mule Canyon, Cedar Mesa, Utah, United States of America, North America

A scenic view of a historic stone bridge over a river, surrounded by lush greenery and quaint houses under a partly cloudy sky.

St. Paul's Church, beautifully situated over River Ill, a neo-gothic edifice built in 1889 under German rule, Strasbourg, Alsace, France, Europe

A wooden bridge arches over a rocky landscape, surrounded by lush green grass and cliffs under a colorful sky with soft clouds.

Over Under Anasazi Ruins, Ancestral Pueblo, Bear's Ears National Monument, Utah, United States of America, North America

Sunset view under a pier with sunburst effect, reflecting on wet sand and calm water, Prince of Wales Bridge, the Second Severn Crossing, M4 motorway over the River Severn, between England and Wales, United Kingdom, Europe

Cifton Suspension Bridge over a scenic gorge with a river, under a clear blue sky in Bristol, England, United Kingdom, Europe

Majestic medieval castle with stone bridge over a river, surrounded by wild nature under a cloudy sky, Eilean Donan, Dornie, Scotland, United Kingdom, Europe

Scenic view of a historic bridge over a river with classical buildings in the background under a clear blue sky, Paris, France, Europe

Jewellery displays under the 1937 Art Deco dome over the huge Central Market, city centre, Phnom Penh, Cambodia, Indochina, Southeast Asia, Asia

American Alligator (Alligator mississippiensis) split over and under water shot, Florida Everglades, Florida.

Palm trees lean over white sand, under a blue sky, on Bandos Island in The Maldives, Indian Ocean, Asia

Palm trees lean over white sand, under a blue sky, on Bandos Island in The Maldives, Indian Ocean, Asia

Bare tree under the Milky Way arch in the starry sky over Pico Ruivo mountain, Madeira, Portugal, Atlantic, Europe

Black-browed albatross (Thalassarche melanophris) in flight low over the sea, showing full span of under wing, South Georgia, Polar Regions

Waves crashing over Ilheus da Rib and Ribeira da Janela rock formations under the starry night sky, Madeira, Portugal, Atlantic, Europe

Sun rising over the rippled sand of desert under a cloudy sky, Corralejo Natural Park, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

Early morning sailing under the Chain Bridge over the Danube River, Budapest, Hungary, Europe

A boat passes under one of the bridges over the Vltava River in Prague, Czech Republic, Europe

Moonlight over the fishing village of Eggum under the Aurora Borealis (Northern Lights), Vestvagoy, Nordland county, Lofoten Islands, Norway, Scandinavia, Europe

A boat going under a bridge over the Keizersgracht Canal, Amsterdam, Netherlands, Europe

Market under the bridge over Mandare River, Berenty, Fort Dauphin, Toliara Province, Madagascar, Africa

A boat going under a bridge over the Keizersgracht Canal, Amsterdam, Netherlands, Europe

Rower going under the Triana bridge over the Guadalquivir River, Triana district, Seville, Spain, Andalusia, Spain, Europe

Gondola passing under a bridge over a small canal, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Gondola passing under a bridge over a small canal, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Over under image of coral reef ( Acropora spp.) and trees at Majikin Island, Namu atoll, Marshall Islands, Pacific

Over under image sandy bottom and trees at Majikin Island, Namu atoll, Marshall Islands, Pacific

View of Rio-Niteroi bridge over Guanabara Bay under fog, Rio de Janeiro, Brazil, South America

In January 2005 a severe storm hit Cumbria that created havoc on the roads and toppled over one million trees, clean-up operation under way, Carlisle, Cumbria, England, United Kingdom, Europe

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.

Split image of staghorn coral, Acropora sp., and uninhabited island, Ailuk atoll, Marshall Islands, Pacific

Over under image of marshallese boy smiling underwater next to coral reef and coconut trees lining the shore of Majikin Island, Namu atoll, Marshall Islands (N. Pacific).

Over under of banca and sandy seafloor, Apo island Marine Reserve, Philippines.

Over under image of coral reef, Acropora spp., and trees at Majikin Island, Namu atoll, Marshall Islands (N. Pacific).

Thousands of scalefin anthias, Pseudanthias squamipinnis, hover over corals and barrel sponge, Puerto Galera, Mindoro, Philippines.

Over under image of coral reef, Acropora spp., and trees at Majikin Island, Namu atoll, Marshall Islands (N. Pacific).

Split image of sand bottom and island, Rongelap, Marshall Islands, Micronesia

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.

Mars (at left) and the Milky Way (at right) over a single tipi (with another under construction at back) at the Two Trees site at Grasslands National Park, Saskatchewan, August 6, 2018. I placed a low-level warm LED light inside the tipi for the illumination.

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.

Split image of Marshalhese boy and coconut trees, Ailuk island, Ailuk atoll, Marshall Islands, Pacific

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.

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.

Thousands of scalefin anthias, Pseudanthias squamipinnis, hover over green coral, Tubastrea micrantha, Puerto Galera, Mindoro, Philippines.

Split image of staghorn coral, Acropora sp., and island, Truk lagoon, Chuuk, Federated States of Micronesia, Pacific

Galapagos sharks, Carcharhinus galapagensis, Oahu, Hawaii

Split shot or over under of a shallow reef with a variety of table, leather, and staghorn corals, Acropora sp., Porites sp., Litophyton sp., sarcophyton sp., and the island of Bunaken, Bunaken Marine Park, Manado, North Sulawesi, Indonesia, Pacific Ocean

Split photo of branching staghorn corals, Acropora sp., and islands in the background, Loloda Selatan, Spice Islands, Maluku Region, Halmahera, Indonesia, Pacific Ocean

Ferry over the Elbe river at Coswig under clouded sky, Saxony-Anhalt, Germany, Europe

View over cable car at high rise buildings on the waterfront under clouded sky, Wellington, North Island, New Zealand

View over houses at sailing boats in a bay under blue sky, Admiralty Bay, Port Elizabeth, Bequia, St. Vincent, Grenadines, Caribbean, America

View over the Old Town and the harbour under blue sky, Korcula island, Croatian Adriatic Sea, Dalmatia, Croatia, Europe

View over vineyards to the alps under blue sky, Piedmont, Italy, Europe

View over vineyards to the alps under blue sky, Piedmont, Italy, Europe

Distant telephoto landscape view over ocean water through Golden Gate Bridge to San Francisco Cityscape under a beautiful sunny, blue sky. Copy space

Rugged lava rock formations with a natural arch over a turquoise sea under a blue sky, A Porta do Diabo, Sao Miguel Island, Azores, Portugal, Europe

American tank M42 Duster with self-propelled 40mm anti-tircraft gun, wreck, Hashemite Kingdom of Jordan, Red Sea, Western Asia

The euro currency under a magnifying glass

Tent under a rainbow over meadow, Naryn gorge, Naryn Region, Kyrgyzstan, Asia

Bottlenose dolphin (Tursiops truncatus), female, swims under water surface in sunshine over coral reef, Red Sea, Egypt, Africa

View over Senja's fjords and mountain peaks under the midnight sun, Mount Grytetippen, Senja, Norway, Europe

Palacio de Aljaferia palace illuminated at night under floodlights, flags flying over external wall and towers, Moorish architecture, Zaragoza, Saragossa, Aragon, Spain

View over Senja's fjords and mountain peaks under the midnight sun, Mount Grytetippen, Senja, Norway, Europe

F-16 Fighting Falcon under full thrust on take off, military aircraft

Palacio de Aljaferia palace illuminated at night under floodlights, flags flying over external wall and towers, Moorish architecture, Zaragoza, Saragossa, Aragon, Spain

Under a large bridge over the sea in the sunset with a beautiful sky

Heilbronn Power Station, a coal-fired power plant under a cloudy sky near Heilbronn, Baden-Wuerttemberg, Germany, Europe

Sail yacht right before passing under the StorebÊlt Bridge, Great Belt Bridge, Korsoer, Zealand, Denmark, Europe

Waves washing over rocks under a cloudy sky before sunrise, Jasmund National Park, Ruegen Island, Mecklenburg-Western Pomerania, Germany, Europe

People walking under the Kamennoostrovsky bridge over the Neva River, St. Petersburg, Russia

Monrovia, Liberia - September 19, 2007: Children selling snack food on the beach in the the fishing community of West Point in the Liberian capital of Monrovia which is one of the poorest slums in West Africa and suffers from overcrowding, lack of facilities, unemployment and garbage. The fishing industry is an important source of employment and food for Liberians and is increasingly under threat by better equipped and unregulated foreign vessels over fishing in its unprotected waters.

Monrovia, Liberia - September 18, 2007: Fishermen in West Point , Monrovia, Liberia sorting out, mending and picking trash out of their fishing nets. The fishing industry is an important source of employment and food for Liberians and is increasingly under threat by better equipped and unregulated foreign vessels over fishing in its unprotected waters.

November 7, 2008 Mt Shasta CA A spawned-out Chinook salmon watches over her redd in the Shasta River where it runs through Big Springs Ranch about 2 miles north of the town of Mt Shasta. The ranch, which is contributing to degraded habitat conditions, which actually warm water tempt by upwards of 10 degrees as the river passes through the ranch and then spills into the Klameth, is currently under contract for purchase by TNC, therefor TNC and partner organizations have been allowed to research this stretch of river for the first time. They have discovered that is it a very fertile juvenile rearing area and that there are a surprising number of returning salmon in spite of habitat degraded by grazing cattle (often in the river) and irrigation practices. If this purchase is successful, TNC has the chance to improve a large stretch of habitat and quickly improve conditions that will effect numbers of returning fish and habitat in the Shasta and Klameth Rivers. In California, The Nature Conservancy is focusing its efforts on protecting the Shasta River and its tributaries, which create one of the most important spawning nurseries for Chinook salmon in the entire Klamath Basin, United States of America

Monrovia, Liberia - September 18, 2007: Children skipping in the street in the fishing community of West Point in the Liberian Capital of Monrovia. The fishing industry is an important source of employment and food for Liberians and is increasingly under threat by better equipped and unregulated foreign vessels over fishing in its unprotected waters.

November 7, 2008 Mt Shasta CA A spawned-out Chinook salmon watches over her redd in the Shasta River where it runs through Big Springs Ranch about 2 miles north of the town of Mt Shasta. The ranch, which is contributing to degraded habitat conditions, which actually warm water tempt by upwards of 10 degrees as the river passes through the ranch and then spills into the Klameth, is currently under contract for purchase by TNC, therefor TNC and partner organizations have been allowed to research this stretch of river for the first time. They have discovered that is it a very fertile juvenile rearing area and that there are a surprising number of returning salmon in spite of habitat degraded by grazing cattle (often in the river) and irrigation practices. If this purchase is successful, TNC has the chance to improve a large stretch of habitat and quickly improve conditions that will effect numbers of returning fish and habitat in the Shasta and Klameth Rivers. In California, The Nature Conservancy is focusing its efforts on protecting the Shasta River and its tributaries, which create one of the most important spawning nurseries for Chinook salmon in the entire Klamath Basin, United States of America

Elaina Arenz is carrying her mountainbike over a part of the trail that is not rideable in El Potrero Chico Park. El Potrero Chico means "The Little Corral". It is part of the Sierra Madre occidental and used to be under the sea. It is a unique geologic limestone formation with cliffs up to 2000 ft. high.

Water-level view of the new I64 bridge under construction over the Kanawha River in downtown Charleston, WV.

Eye-level view of the new I64 bridge under construction over the Kanawha River in downtown Charleston, WV.

Silhouettes of four people standing under Ring Road bridge over Jokulsa a Dal river, Hringvegur, Iceland

Panoramic view of over water villas under the moonlight at Gili Lankanfushi, in the Maldives

Bonni Casteel carries her bike over an un-rideable part of a singletrack trail in El Potrero Chico Park in Mexico. El Potrero Chico means "The Little Corral". It is part of the Sierra Madre occidental and used to be under the sea. It is a unique geologic limestone formation with cliffs up to 2000 ft. high.

Snorkeler under the glass floor in a room of bora bora nui resort and spa, Bora bora island society islands french polynesia south pacific

An African bush elephant (Loxodonta africana) is throwing dust over itself with its trunk on a bare earth slope with trees in the background under a clear sky. It has mud stains on its trunk, and the dust is exploding in a cloud against its wrinkled grey skin. Shot with a Nikon D810 in Chobe National Park; Botswana

Sockeye Salmon (Oncorhynchus Nerka) Spawning Pair Positioned Over A Redd That Is Under Construction.

Hawaii, Maui, Close-up of Humpback whale near the oceans surface.

Woman snorkeling in tropical ocean water, Over/under view.

Caribbean, Little Bahama Bank, Atlantic Spotted Dolphins (Stenella) over/under, dive boat B1896

A backpacker pauses for rest beside a puddle while crossing over an unnamed pass in the Brooks Range under the midnight sun at 12:14 a.m.; Alaska, United States of America

Hawaii, Maui, Close-up of Humpback whale near the oceans surface.

Woman snorkeling in tropical ocean water, Beach in distance, Over/under view.

Hawaii, Maui, Woman stand up paddling in ocean just off Canoe Beach, Over/under view.

Closeup of outline of a green lizard from under a leaf, eye and foot over edge

Hawaii, Maui, A reef manta ray, (Manta alfredi) cruises over the shallows off Ukumehame.

Hawaii, Green sea turtle (Chelonia mydas) an endangered species.

Hawaii, Maui, Close-up of Humpback whale near the oceans surface.

Hawaii, Maui, Close-up of Humpback whale near the oceans surface.

Hawaii, Maui, Woman stand up paddling in ocean just off Canoe Beach, Over/under view.