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

1112-8676 - 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

1112-8674 - 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

1112-8670 - 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

832-401577 - Stalagmites, stalactites, limestone deposits, Lipa Cave, Lipska pecina, Cetinje, Montenegro, Europe

832-401576 - Stalagmites, stalactites, limestone deposits, Lipa Cave, Lipska pecina, Cetinje, Montenegro, 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

848-2616 - Fairy Caves, Sarawak, Borneo, Malaysia, Southeast Asia, Asia

848-2613 - Fairy Caves, Sarawak, Borneo, Malaysia, Southeast Asia, Asia

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

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

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.

1184-7702 - Stalactites, Drach caves, Porto Christo, Mallorca, Balearic Islands, Spain, Mediterranean, Europe

1184-7704 - Drach caves, Porto Christo, Mallorca, Balearic Islands, Spain, Mediterranean, Europe

1184-7703 - Drach caves, Porto Christo, Mallorca, Balearic Islands, Spain, Mediterranean, Europe

1184-7701 - Drach caves, Porto Christo, Mallorca, Balearic Islands, Spain, Mediterranean, Europe

1184-7700 - Stalactites and stalagmites, Drach caves, Porto Christo, Mallorca, Balearic Islands, Spain, Mediterranean, Europe

1184-7458 - A'eo Cave, Rurutu, Austral islands, French Polynesia, South Pacific, Pacific

1184-7457 - A'eo Cave, Rurutu, Austral islands, French Polynesia, South Pacific, Pacific

860-291250 - Godafoss during winter, Iceland. Godafoss one of the iconic waterfalls of Iceland during winter. europe, northern europe, iceland, February

1184-7243 - Saint Michael's Cave, Gibraltar, British Overseas Territory, Europe

1184-7244 - Saint Michael's Cave, Gibraltar, British Overseas Territory, Europe

860-290303 - Cap Blanc-nez under the ice in winter, Opal Coast, France

860-290304 - Cap Blanc-nez under the ice in winter, Opal Coast, France

860-288998 - Underwater cave from Misool, Raja Ampat, Indon?sie

1113-103028 - Stalactite cave, Cuevas del Drach, Porto Christo, Majorca, Spain

989-421 - Flooded limestone cave interior with many stalactites and stalagmites and reflections, Drach caves (Cuevas del Drach), Mallorca, Balearic Islands, Spain, Mediterranean, Europe

989-420 - Ornate columns formed by many hanging stalactites and rising stalagmites coalescing, Drach caves (Cuevas del Drach), Mallorca, Balearic Islands, Spain, Mediterranean, Europe

989-422 - Limestone cave interior with many stalactites and stalagmites, Drach caves (Cuevas del Drach), Porto Cristo, Mallorca, Balearic Islands, Spain, Mediterranean, Europe

1245-1935 - Crystal Caves, North Side, Grand Cayman, Cayman Islands, Caribbean, Central America

1184-4239 - Colourful Paradise cave, Phong Nha-Ke Bang National Park, UNESCO World Heritage Site, Vietnam, Indochina, Southeast Asia, Asia

1184-4238 - Colourful Paradise cave, Phong Nha-Ke Bang National Park, UNESCO World Heritage Site, Vietnam, Indochina, Southeast Asia, Asia

1184-4240 - Colourful Paradise cave, Phong Nha-Ke Bang National Park, UNESCO World Heritage Site, Vietnam, Indochina, Southeast Asia, Asia

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

1116-46138 - Prometheus Cave, Imereti, Georgia

1218-1111 - Carlsbad Caverns, The Big Room, UNESCO World Heritage Site, Carlsbad, New Mexico, United States of America, North America

1218-1112 - Carlsbad Caverns, The Big Room, UNESCO World Heritage Site, Carlsbad, New Mexico, United States of America, North America

860-287649 - Cascade du Saut du Laire on the Drac, Prapic, Champsaur Valley, ecrins National Park, Orcieres Merlette, Hautes-Alpes, France

860-287535 - Concretions in the caves of Choranche, cave remarkably rich in fistuleuses, fine stalagmites that can reach several meters long, Massif du Vercors, Isere, France

860-287536 - Concretions in the caves of Choranche, cave remarkably rich in fistuleuses, fine stalagmites that can reach several meters long, Massif du Vercors, Isere, France

1276-1597 - Cueva del Indio (Indian Cave), Vinales, UNESCO World Heritage Site, Pinar del Rio Province, Cuba, West Indies, Central America

1276-1596 - Cueva del Indio (Indian Cave), Vinales, UNESCO World Heritage Site, Pinar del Rio Province, Cuba, West Indies, Central America

801-2488 - Suytun Cenote, Yucatan, Mexico, North America

801-2487 - Suytun Cenote, Yucatan, Mexico, North America

801-2489 - Suytun Cenote, Yucatan, Mexico, North America

860-287004 - Cliffs of Cap Blanc-Nez in winter, Pas de Calais, France

1297-666 - Phra Nang beach and karst landscapes in Railay, Ao Nang, Krabi Province, Thailand, Southeast Asia, Asia

860-286821 - Ice cave, Vatnatjokull glacier, Southern Iceland, Iceland, Europe

832-382946 - Gruta de las Maravillas, lake in a cave, stalactites and stalagmites in a dripstone cave, Aracena, Huelva, Andalusia, Spain, Europe

832-383028 - Gruta de las Maravillas, lake in a cave, stalactites and stalagmites in a dripstone cave, Aracena, Huelva, Andalusia, Spain, Europe

1116-41577 - A Filipino Tour Guide Holds A Lantern Inside Sumaging Cave Or Big Cave Near Sagada, Luzon Philippines

1116-41579 - A Filipino Tour Guide Holds A Lantern Inside Sumaging Cave Or Big Cave Near Sagada, Luzon, Philippines

1116-41578 - A Filipino Tour Guide Holds A Lantern Inside Sumaging Cave Or Big Cave Near Sagada, Luzon, Philippines

832-379116 - Stalactite Cave, Boron Thor, Ban Bo Tho, Krabi, Thailand, Asia

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

1240-210 - Marble Arch Caves, County Fermanagh, Ulster, Northern Ireland, United Kingdom, Europe

746-82239 - Sardinia. Baunei. Mangalistru cave.

746-82236 - Sardinia. Baunei. Su Meraculu cave

746-36097 - Ice stalactite, Gressan, Pila, Valle d'Aosta, Italy

1265-28 - Rudolf Mine in Salina Turda salt mine in Turda city, Romania, Europe

1265-29 - Salina Turda, underground salt mine tourist attraction in Turda city, Romania, Europe

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

832-378733 - Venus Grotto of King Ludwig II, artificial stalactite cave with a lake and a shell-shaped boat, painting "Tannhäuser bei Frau Venus" by August von Heckel, palace gardens of Linderhof Palace, Upper Bavaria, Bavaria, Germany, Europe

733-7143 - Buddha statues, Khao Luang Cave, Petburi City, Petchaburi, Thailand, Southeast Asia, Asia

857-91961 - Reed flute cave, Guilin, Guangxi region, China.

1178-24636 - View of cave, Carlsbad Caverns National Park, New Mexico

832-375994 - Colourfully, illuminated Hang Sung Sot cave, Surprise Cave, Cave of Awe, a UNESCO World Heritage Site, stalactite cave in Halong Bay, Vietnam, Southeast Asia, Asia

816-7145 - Tourist boat floating through the Puerto Princesa underground river, the New Wonder of the World, Puerto-Princesa Subterranean River National Park, UNESCO World Heritage Site, Palawan, Philippines, Southeast Asia, Asia

816-7147 - Puerto Princesa underground river, the New Wonder of the World, Puerto-Princesa Subterranean River National Park, UNESCO World Heritage Site, Palawan, Philippines, Southeast Asia, Asia

816-7146 - Tourist boat floating through the Puerto Princesa underground river, the New Wonder of the World, Puerto-Princesa Subterranean River National Park, UNESCO World Heritage Site, Palawan, Philippines, Southeast Asia, Asia

832-352167 - Batu Caves, limestone caves near Kuala Lumpur, Malaysia, Southeast Asia

832-335159 - Mallorca Coves de Arta - Arta caves

832-334903 - Sinter terraces in the Skocjan caves - Slovenia

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

832-332686 - Coca de ca Marca dripstone caves near Sant Miguel, Ibiza, Baleares, Spain

832-332687 - Coca de ca Marca dripstone caves near Sant Miguel, Ibiza, Baleares, Spain

1163-55 - Tham Khao Luang Cave, Phetchaburi, Thailand, Southeast Asia, Asia

832-269225 - Meramec Caverns with limestone structures such as stalagmites and stalactites on the Meramec River, Missouri, USA

832-269229 - Meramec Caverns with brightly illuminated limestone structures in the so called Movie Theatre, Missouri, USA

832-234639 - Varied lighting in the largest stalactite cave of Guilin, the Reed Flute Cave, Guilin, Guangxi, China, Asia

832-234638 - Colourful illumination in the largest stalactite cave of Guilin, the Reed Flute Cave, Guilin, Guangxi, China, Asia

832-219071 - Colorful illuminated cave at Halong Bay, UNESCO World Heritage Site, Vietnam, Asia

832-179212 - Interior of Ali Sadr Cave, Hamadan, Hamedan, Persia, Iran, Asia

832-179211 - Interior of Ali Sadr Cave, Hamadan, Hamedan, Persia, Iran, Asia