Hoover Dam Bridge The Mike O’Callaghan–Pat Tillman Memorial Bridge is an arch bridge in the United States that spans the Colorado River between the states of Arizona and Nevada. Photo By Jamey Stillings
Rakotz Bridge (“Devil’s Bridge”) in Kromlau, Germany, was built to create an optical illusion; regardless of the vantage point, it forms a perfect circle with its reflection in the waters of Lake Rakotzsee.
Gorges de l'Areuse, Switzerland The Val de Travers is a Jura mountain valley perpendicular to the main valleys (hence the name). The river Areuse has cut itself steeply through the soft limestone and clay sediments.