MOUNT JEWETT, Pa. — A bridge in Pennsylvania was once the tallest railroad structure and was known as the "Eighth Wonder of the World." It even became the centerpiece of a state park.

This article was originally published with the title “ The New Susquehanna Bridge, Pennsylvania Railroad ” in Scientific American Magazine Vol. 97 No. 20 (November 1907), p. 362 doi:10.1038 ...

A trestle once used by the Pennsylvania Railroad towers over Route 61 between Pottsville and St. Clair. (FILE) The most famous of the PRR bridges was the trestle over Route 61, north of Saint Clair.