The largest underground lake in the US is under Tennessee, discovered by a 13 yr old boy

Deep inside a mountain near Sweetwater in East Tennessee is a remarkable body of water known as The Lost Sea. Listed by the Guinness Book of World Records as America’s largest underground lake, the Lost Sea is part of an extensive and historic cave system called Craighead Caverns. Continue reading The largest underground lake in the US is under Tennessee, discovered by a 13 yr old boy