Rockville Bridge. The longest stone masonry arch railroad bridge in the world, visible to the south, was built between 1900 and 1902. Named for the surrounding small settlement, it has forty-eight arches and a length of 3,820 feet. It is the third bridge constructed here by the Pennsylvania Railroad. A wooden structure had been built 1847-49, followed by an iron bridge in 1877.

N Front St. in Susquehanna Twp., Fort Hunter, PA, United States