Home for historians and modelers of the Pennsylvania Railroad!
Keystone Crossings has served 22214424 pages since June 1, 1997.
Lots of signaling information and interlocking diagrams, but not kept up. No new content in some time.
If Keystone Crossings is the largest Pennsy site out there, Rob's is second! Lots of freight info, MoW diagrams, and other documents. A "must see" stop on the Pennsy Cyber Highway.
An HO scale PRR modeling site based in Italy.
Focusing on Locomotives Built, Rebuilt, and Completed at Altoona, PA by the PRR, PC, CR, and NS at the Altoona Machine Shops and Juniata Shops.
This railroad blog contains extensive photography of the ex-Pennsy main line.