Federal Forward Line

Historical marker location:

1504 Columbia Avenue, Franklin, Tennessee

( Memorial is at the intersection of Columbia Avenue (U.S. 31) and Fairgrounds Street, on the right when traveling south on Columbia Avenue.)

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.