Description
Rockville Bridge Harrisburg PA Longest Stone Arch Railroad Bridge Postcard. Color postcard of Rockville Bridge, Harrisburg, Pennsylvania. Completed in 1901, it is recognized as the longest stone arch railroad bridge in the world, spanning the Susquehanna River between Marysville and Rockville. Published by Pennsylvania Beauty Views. Color postcard of Rockville Bridge, Harrisburg, Pennsylvania. Completed in 1901, it is recognized as the longest stone arch railroad bridge in the world, spanning the Susquehanna River between Marysville and Rockville. Published by Pennsylvania Beauty Views.