Allegheny Portage Railroad National Historic Site is off US 22 Gallitzin exit, following signs. Considered to be a 19th-century technological wonder, this site employed a series of inclined planes for transporting trains and canal boats over the Allegheny Mountains. Models, exhibits and artifacts depict its significance as a critical link in westward travel and trade.
An 1830s tavern, the Skew Arch Bridge, Incline Plane No. 6 and stone railroad ties can still be seen. Interpretive programs are offered in summer.