Hogback Covered Bridge - Credit: Wikimedia Commons
The Hogback Covered Bridge is a historic covered bridge near Winterset, Iowa. Named after a nearby limestone ridge, it was built in 1884 by Harvey P. Jones and George K. Foster over the North River on Douglas Township Road. The bridge was designed with a Town lattice truss system. It was built with steel pylons to support the main span. Read more on Wikipedia
Source: en.wikipedia.org