The Marcio Aqueduct gate entering the city, Rome, Lazio, Italy, Europe

Tourists on camels being led into the Singing Sand Dunes in Dunhuang, Northwest Gansu province, China, Asia

View of towers from narrow street in San Gimignano, San Gimignano, UNESCO World Heritage Site, Province of Siena, Tuscany, Italy, Europe

Plaza de Espana, built for the Ibero-American Exposition of 1929, Seville, Andalucia, Spain, Europe

Tea plantations, Vagamon, Kerala, India, Asia

Reindeer (Rangifer tarandus) female, Cairngorms National Park, Scotland, United Kingdom, Europe

Profile of a hiker on the sand dune shaped by the wind, Deadvlei, Sossusvlei, Namib Desert, Namib Naukluft National Park, Namibia, Africa

Aerial of the Sunset Beach, Koh Lipe, Tarutao National Park, Thailand, Southeast Asia, Asia

Small village in the bottom of Wadi Bani Khalid, Sultanate of Oman, Middle East

Monastery of Rousanou, elevated view, Meteora, UNESCO World Heritage Site, Thessaly, Greece, Europe

Cave filled with buddhas, Yathaypyan Cave, Hpa-An, Kayin state, Myanmar (Burma), Asia

Dead Vlei, Sossusvlei, Namibia, Africa

View of Freya's Castle and Vishnu Temple on the left and Wotan's Throne on the right at sunrise viewed from Cape Royal, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Huge sitting Buddhas, Ko Yin Lay, Pupawadoy Monastery near Ye, Mon state, Myanmar (Burma), Asia

The church of the little village of Schmitten surrounded by snow, Albula District, Canton of Graubunden, Switzerland, Europe

The crystal clear water of the Indian Ocean with a deserted beach and the shadow of two palm trees, The Maldives, Indian Ocean, Asia

Aerial view of Binevenagh Mountain in County Antrim, Ulster, Northern Ireland, United Kingdom, Europe

Saguaro cactus (Carnegiea gigantea), photographed at sunrise in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America

Colonial buildings, Paraty, UNESCO World Heritage Site, Brazil, South America

Velka Amerika (Big America) Quarry, Morina near Prague, Central Bohemia, Czech Republic (Czechia), Europe

Ethereal woman at the Imperial Sand Dunes, California, United States of America, North America

Rock arch, landmark, La Maceta, UNESCO biosphere reserve, El Hierro, Canary Islands, Spain, Atlantic, Europe

Iguana on a white sand beach, Exumas, Bahamas, West Indies, Caribbean, Central America

Plaza del Mercado Chico, Avila, UNESCO World Heritage Site, Castile and Leon, Spain, Europe

Katse Dam, Lesotho, Africa

Granite mountains at sunset, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Bottom Bay, St. Philip, Barbados, West Indies, Caribbean, Central America

Bottom Bay, St. Philip, Barbados, West Indies, Caribbean, Central America

Panorama of Cima Presanella at dawn seen from Monte Tonale, Valcamonica, border Lombardy and Trentino-Alto Adige, Italy, Europe

City Walls, UNESCO World Heritage Site, Dubrovnik, Croatia, Europe

View of theatre and Iglesia de San Bartolome in San Bartolome, Lanzarote, Las Palmas, Canary Islands, Spain, Atlantic, Europe

Former Panoramic restaurant, Monsanto, Lisbon, Portugal, Europe

View of a rock formation called Cathedral Butte at the base of the Vermilion Cliffs, Glen Canyon Recreation Area, Arizona, United States of America, North America

Double Arch, Arches National Park, Utah, United States of America, North America

Dolly Beach, Christmas Island, Australia, Indian Ocean

Long exposure of gondolas by San Giorgio Maggiore, Venice, Italy, Europe

The Beatles Statue and Royal Liver Building at night, Pier Head, Liverpool Waterfront, Liverpool, Merseyside, England, United Kingdom, Europe

West Rim, Grand Canyon and Colorado River, UNESCO World Heritage Site, Arizona, United States of America, North America

Beach at Port Elizabeth, Admiralty Bay, Bequia, The Grenadines, St. Vincent and the Grenadines, Windward Islands, West Indies, Caribbean, Central America

The gardens of the Royal Palace, Torino (Turin), Piedmont, Italy, Europe

Wawel Cathedral, Wawel Castle, UNESCO World Heritage Site, Krakow, Poland, Europe

Gondolas with tourists on canal, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Windmill near Benz, Achterland, Usedom Island, Baltic Sea, Mecklenburg-Western Pomerania, Germany, Europe

Cathedral of Orizaba, Orizaba, Veracruz, Mexico, North America

The ornate facade of Chiesa San Mateo in the historic center of Lecce, Puglia, Italy, Europe

Waterfall in Lava Canyon, Mount St. Helens National Volcanic Monument, Washington State, United States of America, North America

Turku Castle, Turku, Finland, Europe

Panoramic view of old fishing village in Robin Hood's Bay, North Yorkshire, England, United Kingdom, Europe

Joshua tree (Yucca brevifolia), at night in Joshua Tree National Park, Mojave Desert, California, United States of America, North America

Ancestral Puebloan ruin at Desert View on the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Historic center of Agadez, UNESCO World Heritage Site, Niger, Africa

Aerial of a dry valley in the UNESCO World Heritage Site, at sunrise, Air Mountains, Niger, Africa

The Church of Trinite dei Monti at the top of the Spanish Steps, Rome, Lazio, Italy, Europe

Palazzo Zuccari, Rome, Lazio, Italy, Europe

Badlands at sunset, Emilia Romagna, Italy, Europe

Night shot at Phare du Millier lighthouse, Finistere, Brittany, France, Europe

Sunrise in Etosha savannah with small bushes projecting long shadows, Namibia, Africa

Rocky panorama of the high Atlas mountains in Morocco with a cloudy sky, Morocco, North Africa, Africa

Blue hour on the rocky landscape of Jebel Akhdar mountains in Oman, Middle East

The historic village of Holasovice, UNESCO World Heritage Site, South Bohemia, Czech Republic, Europe

View from Cape Royal, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Longtail boats on Ao Ton Sai beach, Ko Phi Phi Don, Krabi, Thailand, Southeast Asia, Asia

The confluence of Badger Canyon and the Colorado River in Marble Canyon, Arizona, United States of America, North America

View of the village of Castelluccio di Norcia with lentil fields and mountains at sunrise, Perugia, Umbria, Italy, Europe

The Temple of Friendship in Pavlovsk Park, Pavlovsk, near St. Petersburg, Russia, Europe

Qal'at al-Bahrain (Bahrain Fort), UNESCO World Heritage Site, Kingdom of Bahrain, Middle East

Qal'at al-Bahrain (Bahrain Fort), UNESCO World Heritage Site, Kingdom of Bahrain, Middle East

Rugged mountains west of Salalah, Oman, Middle East

Halifax City Hall and Grand Parade, Downtown Halifax, Nova Scotia, Canada, North America

Lighthouse in Peggy's Cove at sunrise, Nova Scotia, Canada, North America

View of boutique shops in Rubicon Marina, Playa Blanca, Lanzarote, Canary Islands, Spain, Atlantic, Europe

A slot canyon along Cathedral Wash in Glen Canyon Recreation Area, Arizona, United States of America, North America

Aerial of the Engadine, Graubunden Canton, Swiss Alps, Switzerland, Europe

Aerial cityscape view of Tbilisi's old town at sunrise, Tbilisi, Georgia (Sakartvelo), Central Asia, Asia

Presidental Palace of the Republic of Moldova, Chisinau, Moldova, Europe

View of narrow whitewashed street in Skiathos Town, Skiathos Island, Sporades Islands, Greek Islands, Greece, Europe

View of the Dom Luis I bridge over Douro River and terracota rooftops, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

The ruins of the ancient Roman and Byzantine city of Bet Shean, Bet Shean National Park, Israel

Dodekalitten at sunset, Lolland island, Zealand region, Denmark, Europe

Fairy Caves, Sarawak, Borneo, Malaysia, Southeast Asia, Asia

Three peaks of Lavaredo (Tre Cime di Lavaredo) mountains covered by pristine snow, Dolomites, Belluno, Italy, Europe

East view of Canyon De Chelly National Monument North Rim from Antelope House Overlook, left fork leads to Many Cherry Canyon, right fork to Black Rock Canyon, Arizona, United States of America, North America

Association of Polish Architects, Konstanty Zamoyski's Palace, Warsaw, Masovian Voivodeship, Poland, Europe

Man on a donkey cart near the Memphite Necropolis, UNESCO World Heritage Site, Egypt, North Africa Africa

View of cafe and bar in narrow street in Montepulciano, Montepulciano, Province of Siena, Tuscany, Italy, Europe

View of Baptistery of San Giovanni, Pisa Cathedral and Leaning Tower of Pisa, UNESCO World Heritage Site, Pisa, Province of Pisa, Tuscany, Italy, Europe

Old town of Quebec City, Quebec, Canada, North America

African elephants (Loxodonta africana) drinking at waterhole, Mashatu Game Reserve, Botswana, Africa

African elephant (Loxodonta africana) and calf, Mashatu Game Reserve, Botswana, Africa

The German Artillery Battery at Longues-sur-Mer, Longues-sur-Mer, Normandy, France, Europe

View towards the Panagia Spiliani, Blessed Virgin Mary of the Cave Monastery, Mandraki, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe

View towards the Halki Island, Dodecanese, Greek Islands, Greece, Europe

St. Stefanos Basilica Ruins and Kastri Island at sunset, Agios Stefanos Beach, Kos Island, Dodecanese, Greek Islands, Greece, Europe

A pair of sandstone hoodoos at Ferry Swale in the Glen Canyon Recreation Area near Page, Arizona, United States of America, North America

The safety railed stone cliff of the Mohave Point Overlook, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

View of palm trees and Playa Delfines, Cancun, Caribbean Coast, Yucatan Peninsula, Riviera Maya, Mexico, North America

Aerial view of skiers and alpine hut, Kleine Scheidegg, Bernese Oberland, Swiss Alps, Switzerland, Europe

Reclining Buddha, Shwethalyaung Temple, Bago, Myanmar (Burma), Asia

View of Kaiser Wilhelm Memorial Church, Kurfurstendamm, Charlottenburg, Berlin, Germany, Europe

View of Kaiser Wilhelm Memorial Church, Kurfurstendamm, Charlottenburg, Berlin, Germany, Europe