Limyra Roman Bridge

The Limyra Bridge (in Turkish: Kırk Göz Kemeri, "Bridge of the Forty Arches") is a late Roman bridge in Lycia, in modern south-west Turkey, and one of the oldest segmented arch bridges in the world. The 360 m (1,181.1 ft) long bridge is located near the ancient city of Limyra, and spans the Alakır Çayı river over 26 segmental arches. These arches, with a span-to-rise ratio of 5.3:1, give the bridge an unusually flat profile, and were unsurpassed as an architectural achievement until the late Middle Ages. Despite its unique features, the bridge remains relatively unknown, and only in the 1970s did researchers from the Istanbul branch of the German Archaeological Institute carry out field examinations on the site.