With over 8,000 cubic meters of water, it contains more 3.5 Olympic swimming pools of water volume, all geothermally heated.

Czech researchers working in Albania discovered the largest underground thermal lake in the world. Screengrab from ... set out on an expedition to map an extensive cave system in the southern ...

Scientists have discovered the world's largest underground thermal lake in a cave in southern Albania, the results ... we created a basic map using our equipment and immediately realized that ...