Madison College

Historical marker location:

1029 Neelys Bend Rd, Madison, Tennessee

( Marker is on Hospital Drive, 0.1 miles north of Neelys Bend Road, on the left when traveling north.)

Marker installed: 1970

The largest underground lake in the United States is located in Tennessee. The Lost Sea, located in Sweetwater, Tennessee, covers over four acres and is home to a variety of unusual creatures, including blind fish and crayfish.