Starrucca Viaduct

Starrucca Viaduct is a stone arch bridge that spans Starrucca Creek near Lanesboro, Pennsylvania, in the United States. At the time of its construction, the bridge was thought to be the most expensive railway bridge in the world, at a cost of $320,000 (equal to $8,722,462 today). It was the largest stone rail viaduct in the mid-19th century and is still in use.

• http://en.wikipedia.org/wiki/Starrucca Viaduct