Robert Birdwell

Historical marker location:

Knoxville, Tennessee

( Marker is at the intersection of Wall Avenue and South Gay Street, on the left when traveling west on Wall Avenue.)

(1924-2016). Knoxville History Project.

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.