Pont Julien, Bonnieux, Provence - seen from the rather dried-up river bed.
The Pont Julien (French for Julian Bridge) is a Roman stone arch bridge over the Calavon river in the south-east of France dating to 3 BC. It was located on the Via Domitia, an important Roman road.The bridge's natural stones were cut to a precise fit, and were not cemented with any mortar.