Block signals were introduced in 1875 ... It wasn't long until Horseshoe Curve caught the attention of many wishing to witness this marvel and its scenic beauty. The Pennsylvania Railroad didn ...

Courtesy photo Irish Pennsylvania Railroad Workers operate machinery during railroad construction in the 1850s. The world famous Horseshoe Curve continues to be considered a modern marvel.

Mirror photo by Patrick Waksmunski / The Railroaders Memorial Museum cable-guided funicular at the historic Horseshoe Curve was back in service on Friday. Riding it to the top are (from left ...