1245-3372 - Stairway to The Cave of Pythagoras, Mount Kerkis, Samos Island, North Aegean, Greek Islands, Greece, Europe

1245-3371 - The Real Cave of Pythagoras, Mount Kerkis, Samos Island, North Aegean, Greek Islands, Greece, Europe

1245-3370 - The Real Cave of Pythagoras, interior, Mount Kerkis, Samos Island, North Aegean, Greek Islands, Greece, Europe

1245-2945 - Panagia Spiliani, Blessed Virgin Mary of the Cave Monastery, Mandraki, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe

1245-2936 - View towards the Panagia Spiliani, Blessed Virgin Mary of the Cave Monastery, Mandraki, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe

1245-2925 - Panagia Spiliani, Blessed Virgin Mary of the Cave Monastery, Mandraki, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe

1245-2924 - View towards the Panagia Spiliani, Blessed Virgin Mary of the Cave Monastery, Mandraki, Nisyros Island, Dodecanese, Greek Islands, Greece, Europe

1376-44 - Sunshine and showers with autumn colours from Rydal Cave, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

1376-22 - Reflections from Rydal Cave, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

1376-1 - Reflections from Rydal Cave in the Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

1235-191 - Rock formations and cave houses in Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

1235-192 - Rock formations and cave houses in Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

1235-190 - Rock formations and cave houses in Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

1235-188 - Rock formations and cave houses in Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

1235-189 - Rock formations and cave houses in Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

1235-187 - Rock formations and cave houses in Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

1235-186 - Rock formations and cave houses in Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

1311-726 - Grand Canyon viewed through a rock cave below Lipan Point on the South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

832-404407 - A cave entering the water from the beach at Praia da Coelha, Algarve, Albufeira. Portugal

832-404406 - A natural summer beach cave at Praia da Coelha, Algarve, Albufeira. Portugal

1112-8718 - La Cueva rock shelter is an archeological site occupied from almost 5,000 BC, Dripping Springs Trail, Las Cruces, New Mexico, United States of America, North America

1116-52832 - Woman standing under the large, boulders on the seaside shores of The Baths, a famous beach in the BVI's, Virgin Gorda, British Virgin Islands, Caribbean

1112-8681 - Entrance to the main cave at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8680 - Stalactites in the main cave at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8678 - Stalactites in the main cave at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8679 - Floe stone in the main cave at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8677 - Entrance to the main cave at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8676 - Floe stone in the main cave at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8675 - Entrance to the main cave at Carlsbad Caverns National Park,UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8674 - Inside the Big Room at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8673 - Inside the Big Room at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8672 - Popcorn in the main cave at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8670 - Inside the Big Room at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8671 - Inside the Big Room at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8669 - Inside the Big Room at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8668 - Inside the Big Room at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8667 - Inside the Big Room at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

1112-8659 - A waterfall running through the Mossy Cave Trail in Bryce Canyon National Park, Utah, United States of America, North America

1112-8658 - A view from the Mossy Cave Trail of red rock and hoodoos, Bryce Canyon National Park, Utah, United States of America, North America

1112-8655 - A waterfall running through the Mossy Cave Trail in Bryce Canyon National Park, Utah, United States of America, North America

1112-8651 - A stream running through the Mossy Cave Trail in Bryce Canyon National Park, Utah, United States of America, North America

1112-8650 - A stream running through the Mossy Cave Trail in Bryce Canyon National Park, Utah, United States of America, North America

832-404091 - Sandstone cave, Hamburg coat of arms, part of the Teufelsmauer, Timmenrode, Saxony-Anhalt, Germany, Europe

832-404090 - Sunrise at the Hamburg coat of arms, part of the Devil's Wall, sandstone cave, Timmenrode, Saxony-Anhalt, Germany, Europe

1346-246 - Cueva del Gato cave with a waterfall in Andalusia, Spain, Europe

1346-244 - Cueva del Gato cave with a waterfall in Andalusia, Spain, Europe

1346-245 - Cueva del Gato cave with a waterfall in Andalusia, Spain, Europe

1346-243 - Cueva del Gato cave in Andalusia, Spain, Europe

832-402786 - Aerial view, Bulgarian Orthodox cave monastery, rock monastery, Bassarbowski monastery, Basarbowski, Bassarbowo, Basarbowo, Russe, Rhodope Mountains, Bulgaria, Europe

832-402785 - Aerial view, Bulgarian Orthodox cave monastery, rock monastery, Bassarbowski monastery, Basarbowski, Bassarbowo, Basarbowo, Russe, Rhodope Mountains, Bulgaria, Europe

832-402784 - Aerial view, Bulgarian Orthodox cave monastery, rock monastery, Bassarbowski monastery, Basarbowski, Bassarbowo, Basarbowo, Russe, Rhodope Mountains, Bulgaria, Europe

832-401840 - Interior of Orthodox cave church of St John the Hermit in abandoned Katholiko monastery in Avlaki gorge of Akrotiri peninsula, Chania, Crete, Greece. Shot through open window. Selective focus

1184-8651 - View over the village of Rhumsiki from a cave, Mandara mountains, Far North province, Cameroon, Africa

1353-538 - Windstone Arch (The Fire Cave), Valley of Fire State Park, Nevada, United States of America, North America

1353-536 - Windstone Arch (The Fire Cave), Valley of Fire State Park, Nevada, United States of America, North America

1353-534 - Windstone Arch (The Fire Cave), Valley of Fire State Park, Nevada, United States of America, North America

1160-5192 - Dwelling caves (cave dwellings) on the bay of Matala, Iraklion, Crete, Greek Islands, Greece, Europe

1369-3 - A boy admires a beautiful spring sunset from the Byron cave, Portovenere, La Spezia province, Liguria district, Italy, Europe

860-291727 - Interior view of the Grotte des Moidons, Molain, Jura, France

860-291726 - Interior view of the Grotte des Moidons, Molain, Jura, France

860-291725 - Interior view of the Grotte des Moidons, Molain, Jura, France

860-291724 - Interior view of the Grotte des Moidons, Molain, Jura, France

860-291723 - Interior view of the Grotte des Moidons, Molain, Jura, France

860-291627 - Diver at the bottom of an underwater cave 75 metres deep and which has been flooded for thousands of years (- 20 000 years). Mayotte

860-291626 - Diver at the bottom of an underwater cave 75 metres deep and which has been flooded for thousands of years (- 20 000 years). Mayotte

1184-8540 - Cave dwellings, Garphu, Kingdom of Mustang, Himalayas, Nepal, Asia

1184-8533 - Cave dwellings, Garphu, Kingdom of Mustang, Himalayas, Nepal, Asia

1184-8313 - Altamira Cave, UNESCO World Heritage Site, Cantabria, Spain, Europe

1184-8312 - Altamira Cave, UNESCO World Heritage Site, Cantabria, Spain, Europe

1184-8311 - Altamira Cave, UNESCO World Heritage Site, Cantabria, Spain, Europe

1184-8309 - Altamira Cave, UNESCO World Heritage Site, Cantabria, Spain, Europe

1184-8310 - Altamira Cave, UNESCO World Heritage Site, Cantabria, Spain, Europe

1184-8308 - Altamira Cave, UNESCO World Heritage Site, Cantabria, Spain, Europe

1184-8307 - Altamira Cave, UNESCO World Heritage Site, Cantabria, Spain, Europe

1184-8306 - Altamira Cave, UNESCO World Heritage Site, Cantabria, Spain, Europe

1184-8305 - Altamira Cave, UNESCO World Heritage Site, Cantabria, Spain, Europe

1311-629 - Caves in the cliff walls, used to store food by ancient Anasazi Indians, Canyon De Chelly National Monument, Arizona, United States of America, North America

832-400088 - Boat going into a cave at Praia da Marinha, rocks and cliffs, steep coast in the Algarve, Portugal, Europe

1359-532 - David Gareja Monastery complex, Sagarejo Municipality, Kakhetia, Georgia, Central Asia, Asia

1359-514 - Ancient cave city of Vardzia, Georgia, Central Asia, Asia

1184-8060 - Turquoise water in the Grotto, Christmas island, Australia, Indian Ocean

1359-483 - Exterior of Hpo Win Daung Caves (Phowintaung Caves), Monywa, Myanmar (Burma), Asia

1184-7985 - Santana Cave, Atlantic Forest South-East Reserves, UNESCO World Heritage Site, Alto Ribeira Touristic State Park, Sao Paulo State, Brazil, South America

1336-780 - Al Deir (Monastery) monument at sunset, carved into the mountain side and framed by a cave, Petra, UNESCO World Heritage Site, Jordan, Middle East

1350-6630 - Swimming at Cenote Ik Kil in Yucatan, Mexico, a natural pit, or sinkhole near Chichen Itza. Yucatan Peninsula, Quintana Roo, Mexico. Ik Kil was sacred to the Mayans who used this cenote for both relaxation and ritual services centuries ago.

1350-6633 - Gran Cenote de Tulum in Yucatan Peninsula, Quintana Roo, Mexico. There are thousands of cenotes dotted all over Mexico���s Yucatan Peninsula, and their existence is as much a defining characteristic of the region as is the distinct geological feature from which they result. Once revered by the ancient Mayans as sacred wells, they are now magnets for tourists, adventurers, and explorers alike.

1350-6628 - Cenote Ik Kil in Yucatan, Mexico, a natural pit, or sinkhole near Chichen Itza. Yucatan Peninsula, Quintana Roo, Mexico. Ik Kil was sacred to the Mayans who used this cenote for both relaxation and ritual services centuries ago.

1350-6670 - Replica of the grotto at the Lady of the Lourdes shrine in the Convent of the Concepcionistas. Viveiro, Lugo, Galicia, Spain, Europe

1350-6664 - Inside Basílica de Santa María la Real de Covadonga catholic church in Cangas de Onis, Picos de Europa, Asturias, Spain, Europe. In 1777 a fire destroyed the old temple, which stood adjacent to the Holy Cave where Our Lady of Covadonga is revered. It was then decided to raise a new church as a monumental sanctuary, raising donations from all of Spain; the plan was opposed by the local council, as the canons wanted to rebuild the temple of the Holy Cave and build an ambitious sanctuary that had once been designed by Ventura Rodríguez, but never completed. One century later, the project was resumed by King Alfonso XII of Spain, who was interested in completing this work. The classic design of Ventura Rodríguez was very difficult and expensive and was replaced by a new neo-Medieval design.

1350-6663 - Our Lady of Covadonga. The Blessed Virgin Mary, and a Marian shrine devoted to her at Basílica de Santa María la Real de Covadonga catholic church in Cangas de Onis, Picos de Europa, Asturias, Spain, Europe. In 1777 a fire destroyed the old temple, which stood adjacent to the Holy Cave where Our Lady of Covadonga is revered. It was then decided to raise a new church as a monumental sanctuary, raising donations from all of Spain; the plan was opposed by the local council, as the canons wanted to rebuild the temple of the Holy Cave and build an ambitious sanctuary that had once been designed by Ventura Rodríguez, but never completed. One century later, the project was resumed by King Alfonso XII of Spain, who was interested in completing this work. The classic design of Ventura Rodríguez was very difficult and expensive and was replaced by a new neo-Medieval design.

1350-6577 - Sa Calobra Sailing boat at sunset in Torrent de Pareis, Mallorca, Spain

1336-760 - Caves carved in the stone of the mountain inside, Petra, UNESCO World Heritage Site, Jordan, Middle East

801-3214 - Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

801-3213 - Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

801-3217 - Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

801-3215 - Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

801-3216 - Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

801-3195 - Cave Houses, near Cavusin, Cappadocia Region, Nevsehir Provice, Anatolia, Turkey, Asia Minor, Asia

801-3196 - Cave Houses, near Cavusin, Cappadocia Region, Nevsehir Provice, Anatolia, Turkey, Asia Minor, Asia

801-3209 - Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia