Earthworks

Historical marker location:

Chattanooga, Tennessee

( Marker can be reached from North Crest Road north of Lightfoot Mill Road.)

Marker installed: 1890

G. A. Smith's Brigade.

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.