An underground lake (also known as a subterranean lake) is a lake underneath the surface of the Earth. Most naturally occurring underground lakes are found...

Saint-Léonard underground lake (French Lac souterrain de Saint-Léonard) is located at Saint Léonard in the canton of Valais, Switzerland. It is formed...

Waterfall located underground Underground lake – Lake under the Earth's surface Wikimedia Commons has media related to Underground rivers. William Herbert...

The Moqua Well is a small underground lake, in Nauru. During World War II, Moqua Well was the primary source of drinking water for inhabitants of Nauru...

The Lake Vermilion-Soudan Underground Mine State Park is a Minnesota state park at the site of the Soudan Underground Mine, on the south shore of Lake Vermilion...

of salt", an underground lake, stalactites, and salt efflorescences complete the inert equilibrium of the giant bell. The underground lake is between 0...

contains the world's largest non-subglacial underground lake, with an area of almost 2 hectares (4.9 acres). The lake is located around 100 metres (330 ft)...

and the world's second largest non-subglacial underground lake, The Lost Sea. In addition to the lake, the caverns contain an abundance of crystal clusters...

may date back to the Miocene Epoch. There is an underground lake situated in the caves called Martel Lake, which is about 115 m in length and 30 m in width...

Lake Vouliagmeni ("Sunken Lake") is a small brackish-water lake fed by underground currents seeping through the mass of Mount Hymettus located to the south...