Sea Caves and Coastal Karst
Wave-cut sea caves, hybrid karst-sea caves, and the geological collisions where the ocean meets limestone.
Read more →72,384 cave entrances in 214 countries
Discover 72,384 cave entrances worldwide
72,384 cave entrances214 countries
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Gypsum Caves and Selenite Crystals
Why some caves grow crystals instead of stalactites — the chemistry of gypsum-dominated cave systems from Naica to Lechuguilla.
Read more →Anatomy of a Lava Tube
Lavacicles, benches, breakdown rooms and skylights — what you see inside a lava tube and how it formed.
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Italy11,361 cave entrancesFrance10,792 cave entrancesSpain9,187 cave entrancesAustria6,492 cave entrancesGermany2,546 cave entrancesSlovakia2,535 cave entrancesRussia2,113 cave entrancesUnited Kingdom1,649 cave entrancesUnited States of America1,615 cave entrancesHungary1,577 cave entrancesSlovenia1,415 cave entrancesPoland1,254 cave entrancesChina1,230 cave entrancesJamaica1,121 cave entrancesCroatia889 cave entrancesGreece845 cave entrancesCzechia824 cave entrancesSwitzerland629 cave entrancesBelgium605 cave entrancesRomania551 cave entrancesBrazil509 cave entrancesAustralia468 cave entrancesMontenegro434 cave entrancesPortugal429 cave entrancesIndia371 cave entrancesBulgaria367 cave entrancesIsrael356 cave entrancesTurkey352 cave entrancesSweden347 cave entrancesJapan344 cave entrancesRepublic of Serbia340 cave entrancesBosnia and Herzegovina324 cave entrancesThailand319 cave entrancesPhilippines317 cave entrancesSaudi Arabia297 cave entrancesMexico293 cave entrancesPeru257 cave entrancesVietnam256 cave entrancesNorway250 cave entrancesNew Zealand243 cave entrancesUkraine235 cave entrancesAlbania235 cave entrancesSouth Africa234 cave entrancesGeorgia225 cave entrancesIndonesia215 cave entrancesIreland201 cave entrancesChile196 cave entrancesLaos196 cave entrancesTaiwan174 cave entrancesCanada173 cave entrancesFinland164 cave entrancesMalaysia150 cave entrancesHong Kong S.A.R.145 cave entrancesIran142 cave entrancesArmenia138 cave entrancesSouth Korea138 cave entrancesLuxembourg135 cave entrancesMorocco127 cave entrancesPalestine120 cave entrancesColombia112 cave entrances