Underground lakes or caverns are basically large pools of water that gather or accumulate underneath the earth’s surface. So how does the water get into these inaccessible spaces underground? The answer lies in the movement of the earth through the centuries due to plate tectonics and earthquakes.
As the earth surface moves, empty spaces and caverns are sometimes formed below the surface. And water found on the top of affected areas seep into these spaces through the cracks and fissures created by the movement. Over time, the water accumulates in these underground caverns to form what we now call underground lakes. Thus, it usually takes many many many years for such underground lakes to form, which is why they are so amazing.
Enough of geology talk, enjoy these amazing works of nature and mother earth.
Reed Flute Cave, China
Cave Lake near Margaret River, Australia
Cave Sopot-Boka Kotorska, Montenegro
Wieliczka Salt Mine, Poland
Aktun-Chen, Mexico
Wookey Hole Cave, UK
Melisani Lake, Greece
Augusta, US
Luray Caverns, US
Mirror Lake, Czech Republic
Austria
Lake Souterrain St. Leonard, Switzerland
Sumber artikel : http://www.funtasticus.com/20081214/awesome-underground-lakes/