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system of two separate, but interconnected, karstic limestone caves 18 km north of Beirut

Cave in Bosnia and Herzegovina

cave in Russia

cave in Georgia

cave

cave in the British Overseas Territory of Gibraltar

cave in Ethiopia

cave

ice cave in Romania

group of caves in north central Zimbabwe

cave in Laos

thumb|right|Víðgelmir in Iceland - Expeditioners are walking on top of a "pipe" formed when half molten lava "skin" rolled down the walls when the eruption receded. thumb|right|Víðgelmir has many ice-formations deep within the cave. Víðgelmir () is a lava tube situated in the Hallmundarhraun lava field (formed around 900 AD) in west Iceland, around 2 km southeast of Fljótstunga farm in Hvítársíða, Borgarfjörður. The roof of the lava tube has collapsed, creating two large openings near its north end which are the only known entrances. Víðgelmir is 1585 m long and the largest part of t

cave in Montreal (Quebec, Canada)

cave in Laos

Karst cave in Montenegro

cave managed by an organization and made accessible to the general public, usually for an entrance fee

geological natural monument in Ternopil Oblast, Ukraine

cave in Barbados

cave in Tanzania

cave system in Pokhara, Nepal

Caves in Jamaica