1372-1456 - Majestic yak standing proudly on snow-covered ridge beneath towering peaks in Langtang Valley near Kyanjin Gompa, Nepal Himalayas. Wall of Lantang Lirung behind

1311-1319 - The cliff wall of the Keyhole Sink in the Kaibab National Forest near Williams Arizona. This sink is an open ended sinkhole where water can flow out of it.

1311-1318 - The cliff wall of the Keyhole Sink in the Kaibab National Forest near Williams Arizona. This sink is an open ended sinkhole where water can flow out of it.

785-2597 - Dry stone wall with flowering poppy in front of dramatic sky on the island of Lindisfarne (Holy Island).

1390-424 - Qingjing Mosque (first built 1009) is the oldest surviving mosque in China. Quanzhou, Fujian Province, China. The inscription at the far end of the wall is the original notice for the protection of the mosque issued in 1407A.D.

1353-841 - Flowing Blue Ice Wall Abstract Details, Sapphire Ice Cave, Breiðamerkurjökull Glacier, Vatnajökull National Park, Iceland, Europe

1353-840 - Flowing Blue Ice Wall Abstract Details, Sapphire Ice Cave, Breiðamerkurjökull Glacier, Vatnajökull National Park, Iceland, Europe

845-1349 - Shephards Hut at The Great Wall of Shibden in Shibden Park Halifax Yorkshire

845-1348 - Sheepfold at The Great Wall of Shibden in Shibden Park Halifax Yorkshire

845-1347 - Dry Stone Walls at The Great Wall of Shibden in Shibden Park Halifax Yorkshire

1382-3827 - Mural painting by Jimmy Sheikboudhou on the stadium wall, Baie-Mahault, Basse-Terre, Guadeloupe, overseas region of France,Leewards Islands, Lesser Antilles, Caribbean

860-292978 - Half-timbered house with lots of plants on the facade in Old Mans, Sarthe, France

860-292977 - Half-timbered house with lots of plants on the facade in Old Mans, Sarthe, France

832-406419 - A woman wearing a straw hat and sunglasses is smiling in front of a wall of flowers. The flowers are in various colors and are arranged in a way that creates a beautiful and vibrant display

805-1508 - Spotted Owlet (Athene Brahma) nesting high in the heavily carved wall of the Modhera Sun temple, built after 1026 and dedicated to the Hindu goddess, Surya.

685-3027 - Roman Wall

1385-747 - Urban waterfront view of modern buildings and docked ships under a clear blue sky. Features a brick dock wall in the foreground in Liverpool, UK.

1385-714 - Pandora sign on a white textured wall with branches and budding leaves in the foreground in Harrogate, Yorkshire, UK.

1385-708 - Greggs store sign. White lettering and orange squares on a dark gray tile background, with a lighter stone wall above in Liverpool, UK.

1387-907 - Hawksbill sea turtle eating, Castle Wall, Grand Cayman.

1387-1517 - A Sheepshead looks on as a pair of Blue Angelfish appear to be confused on which direction to go but each are feeding on different parts of coral and algae covered jetty rocks at St. Andrew Bay channel wall in Panama City Beach, Florida.

1387-1509 - An adult American Eel (Anguilla rostrata) prowls along the edge of the Morrison Springs cavern at 85 feet deep watching over the adolescent eels in the clear freshwaters of the state park near Red Bay, Florida.

1387-1251 - December 3, 2012 - Colourful crater lakes of Kelimutu volcano, Flores Island, Indonesia. A crater wall separates Tiwu Nua Muri Koo Fai (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched Lake). The two lakes are highly acidic due to underwater fumarole activity and are turqoise in colour.

1387-1205 - January 22, 2011 - Lava Lake in bottom of summit caldera, Nyiragongo Volcano, Democratic Republic of the Congo.

1387-1201 - January 21, 2011 - Nighttime view of summit caldera with lava lake, Nyiragongo Volcano, Democratic Republic Congo.

1387-1195 - March 1, 2010 - Sabo channel at Haramatsu River with tubular grid dam (slit dam type), for defense and protection against mudflows, with Sakurajima volcano in background, Japan

1387-1176 - January 30, 2011 - Lava lake illuminating walls of pit crater at nightfall, Erta Ale volcano, Danakil Depression, Ethiopia.

1387-1175 - January 30, 2011 - Lava lake illuminating walls of pit crater at nightfall, Erta Ale volcano, Danakil Depression, Ethiopia.

1387-1129 - Underwater photographer at the entrance of a cave framed by pink barrel sponges, North Sulawesi, Indonesia.

1387-1128 - Green sea turtle (Chelonia mydas) resting on a plate coral, North Sulawesi, Indonesia.

832-406315 - Frontal portrait of two multi-ethnic young friends leaning on a wall carrying a digital camera

832-406242 - Wall of columnar basalt with waterfall Bridal Veil Falls, tropical vegetation, Pakoka River, Makomako, Waikato, North Island, New Zealand, Oceania

832-406207 - Kumbhalgarh, die große indische Mauer, Rajasthan, Indien

1311-1233 - Ancient wall of the Fort Silver Indian Ruins overlooking Silver Creek Canyon in Agua Fria National Monument of Arizona. Located near the Pueblo La Plata ruins.

1311-1232 - Ancient wall of the Fort Silver Indian Ruins overlooking Silver Creek Canyon in Agua Fria National Monument of Arizona. Located near the Pueblo La Plata ruins.

844-41030 - View of colourful wall painting on building in the Alfama District on a sunny day, Lisbon, Portugal, Europe

1396-14 - Palestinian Landscape with old olive trees and ancient ruins of a fortress wall

844-40721 - View of hilltop Castelo de Sao Jorge, (Lisbon Castle) illuminated at dusk, Lisbon, Portugal, Europe

844-40636 - View of wall painting depicting city life in Lisbon city centre, Lisbon, Portugal, Europe

1394-4 - Some Circle Bordered Painting attached to the wall

1372-1205 - Close up of the corner wall tower with sun rays behind it. Evening atmosphere in Carcassonne, Languedoc-Roussillon, France

1390-329 - Ancient Quzhou city wall, Zhejiang Province, China

844-40478 - View of colourful architecture at Nagaa Suhayl Gharb on the Nile river near Aswan, Aswan, Nubia, Egypt, North Africa, Africa

844-40474 - View of colourful architecture at Nagaa Suhayl Gharb on the Nile river near Aswan, Aswan, Nubia, Egypt, North Africa, Africa

844-40436 - View of carriage and painted faces on wall on the Nile Corniche on a sunny day, Aswan, Nubia, Egypt, Africa

844-40409 - Interior view of the sculptures of the pharaohs in the Abu Simbel Temple next to Lake Nasser, Temple of the Pharaohs, Ramses II, Nubia, Egypt, Africa

1126-2657 - The Street Art of Metelkova Mesto, Ljubljana, Slovenia, Eastern Europe

1126-2646 - The Slovene National Style Vurnik House, Ljubljana, Slovenia, Eastern Europe

1202-1121 - A snowy winter Dartmoor landscape, near Postbridge, Dartmoor National Park, Devon, Great Britain.

1199-670 - Old bench with daffodils and Old Red telephone box in the countryside in Northamptonshire with blossom

1245-4995 - City Hall, interior detail, City of Puebla, Puebla State, Mexico

785-2519 - Modern stained glass window casting light on a wall in Catedral de Santa Maria la Real de la Almudena, Madrid, Spain

1245-4929 - Ceramic Frog at the wall of Alley of the frogs, Los Sapos Neighbourhood, City of Puebla, Puebla State, Mexico

1245-4928 - Alley of the frogs, Los Sapos Neighbourhood, City of Puebla, Puebla State, Mexico

1245-4905 - Cathedral of Our Lady of the Assumption, detailed view, Oaxaca de Juarez, Oaxaca State, Mexico

1245-4793 - Mitla Archaeological Site, San Pablo Villa de Mitla, Oaxaca State, Mexico

1160-5598 - Graffitis , Camden Town, London, England,

1160-5597 - Amy Winehouse Graffiti, Camden Town, London, England,

1160-5581 - Design Museum, Holland Park, Kensington, London, England,

1160-5577 - Graffitis, Buxton Street, East End, London, England, Grov�britannien

1245-4363 - Tlatelolco Archaeological Site, detailed view, Plaza de las Tres Culturas, Mexico City, Mexico

1245-4300 - Palace of Quetzalpapalotl, interior, Teotihuacan, Mexico State, Mexico

832-405835 - Famous town gate Bab Boujloud in the medina of Fes, Morocco, Africa

832-405913 - Monument to Clemens Winkler in Albertpark, Freiberg, Saxony, Germany, Europe

832-405915 - Donatsturm and Donatstor, Freiberg, Saxony, Germany, Europe

832-405994 - Hilly landscape in Tuscany, view from the upper city wall of Montepulciano, Tuscany, Italy, Europe

832-405793 - Chefchaouen, Rif Mountains, Morocco, Door in light blue tones framed by an arch on a wall, Chefchaouen, Morocco, Africa

832-405794 - Chefchaouen, Rif Mountains, Morocco, Blue wooden door embedded in a whitewashed wall, Chefchaouen, Morocco, Africa

1385-685 - Close-up of 'BOSS' sign in white lettering on a green tiled wall with glass panels in Manchester, UK.

1245-4270 - Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4269 - Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4268 - San Carlos Bastion housing the City Museum, Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4266 - San Carlos Bastion housing the City Museum, Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4256 - Fishmonger statue by the Defensive Wall of the Old Town at dusk, Campeche City, Campeche State, Mexico

1245-4210 - Fishmonger statue by the Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4209 - Pablo Garcia y Montilla Monument in front of the San Carlos Bastion housing the City Museum, Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4208 - San Carlos Bastion housing the City Museum, Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4207 - Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4206 - Puerta de Tierra, Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4205 - Puerta de Tierra, Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4204 - Defensive Wall of the Old Town, Campeche City, Campeche State, Mexico

1245-4202 - Structure I, detailed view, Xpuhil Archaeological Site, Xpujil, Campeche State, Mexico

1245-4130 - Structure II, monster mouth temple at sunset, Central Plaza, Chicanna Archaeological Site, Campeche State, Mexico

1311-1168 - A metal retaining wall holding up the Johnson Canyon Railroad grade that has been damaged, Kaibab National Forest of Arizona, USA

1311-1166 - A metal retaining wall along the Johnson Canyon Railroad, Kaibab National Forest of Arizona, USA

685-2981 - Old Town, United States of America

1382-3339 - Wall painting at Tibetan Buddhist Thikse Monastery, near Leh, Ladakh region, state of Jammu and Kashmir, India, Asia

1382-3337 - Tibetan Buddhist Thikse Monastery, near Leh, Ladakh region, state of Jammu and Kashmir, India, Asia

1382-3267 - Yurutse valley near Rumbak village, Hemis National Park, Ladakh region, state of Jammu and Kashmir, India, Asia

1245-3985 - Yellow street of Izamal, Yucatan State, Mexico

1245-3984 - Architecture of Izamal, detailed view, Yucatan State, Mexico

1245-3982 - Architecture of Izamal, detailed view, Yucatan State, Mexico

1245-3975 - Convent of San Antonio de Padua, Izamal, Yucatan State, Mexico

1365-971 - Vaults, interior of Norwich Cathedral, Norfolk, England

1372-1138 - Castle moat and main tower of Osaka Castle, Osaka, Kansai, Japan

1372-1118 - Beautiful red bridge at Buddhist temple Ryuan-ji at Minoh National Park near Osaka, Kansai Japan

802-1073 - Ponta do Sol, northern Saint Anthony, Cape Verde

1188-1130 - Views of the historical old town in Puebla, Mexico

1372-1099 - Gokuraku-bashi Bridge leading to the Osaka Castle, Japan

1372-1078 - Osaka Castle in Japan. Overlooking the stone moat at Rokuban-yagura Turret on the outer walls framed by autumnal foliage