860-292442 - Cave diver in a karst underwater cave at a depth of 60 metres for the Gumbo La Baharini 2 expedition, Passe Bateau Sud at a depth of 60 metres, Mayotte

832-401604 - Karst cave on the sandy beach near the campsite of Stara Baska, Stara Baska, Island of Krk, Kvarner Gulf Bay, Primorje-Gorski kotar, Croatia, Europe

832-392943 - Riesenburg cave, natural karst cave ruin of Frankendolomite, geotope, natural monument, in the back climber at rock face, near Engelhardsberg, district of Markt Wiesenttal, Upper Franconia, Franconian Switzerland, Franconia, Bavaria, Germany, Europe

832-392945 - Quackenschloss, passage cave, karst cave, geotope, natural monument, near Engelhardsberg, district of Markt Wiesenttal, Upper Franconia, Franconian Switzerland, Franconia, Bavaria, Germany, Europe

832-392942 - Versturzhoehle Riesenburg, natural karst cave ruin of Frankendolomite, geotope, natural monument, near Engelhardsberg, district of Markt Wiesenttal, Upper Franconia, Franconian Switzerland, Franconia, Bavaria, Germany, Europe

832-392944 - Entrance Quackenschloss, passage cave, karst cave, geotope, natural monument, near Engelhardsberg, district of Markt Wiesenttal, Upper Franconia, Franconian Switzerland, Franconia, Bavaria, Germany, Europe

832-385462 - Cave castle Lueg, predjamski grad, Predjama, near Postojna, Slovenia, Europe

832-385461 - Cave castle Lueg, predjamski grad, Predjama, near Postojna, Slovenia, Europe

1116-48601 - Causeway to Sung Sot Cave, Ha Long Bay, Quang Ninh, Vietnam

1116-48617 - Sung Sot Cave, Ha Long Bay, Quang Ninh, Vietnam

819-1191 - Postojna Cave, near Postojna, southwestern Slovenia, Europe

819-1193 - Postojna Cave, near Postojna, southwestern Slovenia, Europe

819-1194 - Postojna Cave, near Postojna, southwestern Slovenia, Europe

819-1192 - Postojna Cave, near Postojna, southwestern Slovenia, Europe

1275-66 - Furong stalactite cave of the Wulong Karst geological park, UNESCO World Heritage Site in Wulong county, Chongqing, China, Asia

741-5427 - Underground lake in the Krizna Jama karst cave, Slovenia, Europe

741-5428 - Underground lake in the Krizna Jama karst cave, Slovenia, Europe

767-1197 - Karst Cave at Xinwen Stone Sea Global Geo Park, Sichuan Province, China, Asia

767-1195 - Karst Cave at Xinwen Stone Sea Global Geo Park, Sichuan Province, China, Asia

1179-1293 - The natural show of Frasassi Caves with sharp stalactites and stalagmites, Genga, Province of Ancona, Marche, Italy, Europe

1179-1292 - The natural show of Frasassi Caves with sharp stalactites and stalagmites, Genga, Province of Ancona, Marche, Italy, Europe

832-337620 - Limestone Caves at Florida Caverns State Park, Marianna, Panhandle, Florida, USA

832-337624 - The "Christmas Tree Room" of Florida Caverns State Park, Marianna, Panhandle, Florida, USA

832-337621 - The "Wedding Room" of Florida Caverns State Park, Marianna, Panhandle, Florida, USA

832-225173 - Egyptian temple of Debod, 2nd century BC, at dusk, Madrid, Spain, Europe

832-45626 - Chang Cave, stalactite or limestone cave in karst rock formations, Vang Vieng, Vientiane, Laos, Indochina, Asia

989-37 - Natural rock archway carved by the sea through karst limestone rock at Cuevas del mar (sea caves) beach, near Llanes, Asturias, Spain.

83-12324 - A variety of speleothems including stalactites, stalagmites, columns, straws and drapery at Ngilgi Cave, a limestone Karst cave system near Yallingup in the South West, Augusta-Margaret River Shire, Western Australia, Australia, Pacific

29-4660 - Sinkhole Plain, polygonal doline karst, near Mammoth Cave, Kentucky, United States of America, North America

83-11986 - 'Bacon strip' curtain formations at King Solomon's Cave in the Mole Creek Karst National Park, the north, Tasmania, Australia, Pacific

83-11981 - Stalactites at King Solomon's Cave in the Mole Creek Karst National Park, the north, Tasmania, Australia, Pacific

83-11988 - Stalactites, stalagmites and rimstone at Marakoopa Cave in Mole Creek Karst National Park, the north, Tasmania, Australia, Pacific

83-11982 - Stalactites, stalagmites and columns at King Solomon's Cave in the Mole Creek Karst National Park, the north, Tasmania, Australia, Pacific

83-11989 - Stalactites, stalagmites and columns at King Solomon's Cave in the Mole Creek Karst National Park, the north, Tasmania, Australia, Pacific

83-11983 - Stalactites and columns at King Solomon's Cave in the Mole Creek Karst National Park, the north, Tasmania, Australia, Pacific

83-11987 - 'Bacon strip' curtain formations at King Solomon's Cave in the Mole Creek Karst National Park, the north, Tasmania, Australia, Pacific