Micah Turner Photography - Picture This; When it comes to the most dangerous railroad tunnels in the world, the Cumberland Gap tunnel ranks quite high. Built in 1888 by the Powell valley
Group chisels away at task of opening old railroad tunnel below Pound Gap - The Mountain Eagle
The Cumberland Gap train tunnel - difficult to find a more scary tunnel! : r/trains
Cumberland Gap Tunnel | Norfolk Southern 1141 and 9499 lead … | Flickr
Group chisels away at task of opening old railroad tunnel below Pound Gap - The Mountain Eagle
Cumberland Gap - Harrogate Tunnel - Cumberland Gap, TN - Abandoned Train Tunnels on Waymarking.com