Nestled on the Allegheny Mountains in a small town of Pennsylvania, a marvel that is thought to be the highest and longest tunnels that was once the Pennsylvania Railroad: Section No. 105 rests. Finished in 1904, the tunnels were used to carry trains up a steep mountain on tracks that travel the historic Horseshoe Curve in Altoona. While the Tunnels themselves are not Perishing, in 1995, that all changed.
Construction in 1995 closed the Gallitzin Tunnel, housing the single track. The main view of the tunnels is located along Jackson Street in Gallitzin, the back of this architectural gem is hidden. When viewing from Jackson Street, it is completely bricked, giving it an aesthetic appearance while the opening in back is just fenced. To get there you must travel Sugar Run Road, a snake like road that allows access to the other side.
The Allegheny Tunnel contains the twin tracks that run parallel to each other and are in use today. Beginning in 1995 construction began to enlarge the tunnel to accommodate the growing height of trains. Widening was also performed to allow for two trains to simultaneously pass through. The decision to close the Gallitzin Tunnel with a lonely single track, was more than likely fiscally and structurally decided.
Up on the hill side next to a track that is still in use is what remains of a Signal House. The Signal House is no longer in use, but it stands tall along the Portage line of the Railroad, from there you can see the Portage Tunnel.