Knoxville, Cumberland Gap and Louisville Railroad

CSX Cumberland Gap Tunnel (Claiborne County, Tennessee)
Built in 1888 -1889 by the Powell's Valley Railroad; sold the same year to the Knoxville, Cumberland Gap and Louisville Railroad; sold in 1896 to the Louisville & Nashville Railroad. Now owned by CSX Railroad to connect Norfolk-Southern RR
Tunnel under Cumberland Mountain on CSX Railroad at Cumberland Gap
Open to traffic

LittleTunnel (Claiborne County, Tennessee)
Built in 1888 as railroad tunnel, connecting Cumberland Gap Tunnel to L & N Railroad line going into Virginia, converted to a walking tunnel
Former Louisville & Nashville railroad tunnel under Poor Valley Ridge at Cumberland Gap
Open to pedestrians