Allegheny Portage Railroad National Historic Site

Skew Arch Bridge (Blair County, Pennsylvania)
Built 1832, Closed to traffic 1922, Restored in 1979
Stone arch bridge over Ravine on Pedestrian Pathway
Open to pedestrians only

Staple Bend Tunnel (Cambria County, Pennsylvania)
Built 1831-33
Tunnel on Rail Trail
Open to pedestrians only