The Layton Bridge is a Pratt truss bridge over the Youghiogheny River, originally built for the Washington Run Railroad,construction began 1893 and it was completed in 1899. The last train crossed in 1931. It was converted to automotive use in 1933, and connects Layton, Pennsylvania with Perryopolis, Pennsylvania via a one-lane tunnel, near the suspected location of the eighteenth century Spark's Fort.