Largest underground lake in Europe

The Seegrotte, formed from an abandoned gypsum mine in the Austrian city of Hinterbruhl, consists of a series of underground channels that form the largest underground lake in Europe.

In 1912, an explosion in the Hinterbruhler gypsum mine, just 20 km from Vienna, it went wrong, causing the complete flooding of the mine, and the formation of a lake. At about 60 meters below ground level, the lake has an area of 6,200 square meters and every day must always be empty, because the water does not completely flood the caves.Read More »Seegrotte in Vienna, Largest underground lake in Europe