Ponts Couverts

The Ponts Couverts are a set of three bridges and four towers that make up a defensive work erected in the 13th century on the River Ill in Strasbourg, France. The three bridges cross the four river channels of the Ill that flow through Strasbourg's historic Petite France quarter. The Ponts Couverts have been classified as a Monument historique since 1928. (Wikipedia)