Czech speleologists exploring a cave system in southern Albania in 2021 discovered the largest underground thermal lake ever found on Earth — a 138-metre-long body of warm water sitting 127 metres beneath the surface at the bottom of a 100-metre vertical abyss — large enough to fill more than three Olympic swimming pools, in complete darkness, that no human being had ever seen before

Somewhere beneath a mountain in southern Albania, in a region called Vromoner near the small town of Leskovik on the Greek border, a body of warm mineral water has been sitting in complete darkness for an indeterminate but very long time, with no human aware of its existence, no light reaching its surface, and no [...] The post Czech speleologists exploring a cave system in southern Albania in 2021 discovered the largest underground thermal lake ever found on Earth — a 138-metre-long body of war