Towers Tunnel is at 37.257, -82.327.  The date on the facing is 1926, but that only notes when the tunnel was reinforced and faced with concrete.  The actual tunnel is older than that by maybe 10 years or so.  This tunnel is 921’in length and cuts through a ridge between two geological features in the park “The Chimney” and “The Towers”.  You can’t see the end because it curves to the right.