Karamagara Bridge

About

The Karamagara Bridge (Karamağara Köprüsü, "Bridge of the Black Cave") is a Byzantine or late Roman bridge in the ancient region of Cappadocia in eastern Turkey, and possibly the earliest known pointed arch bridge. The bridge, along with much of the Arapgir Çayı valley, has been submerged since the completion of the Keban Dam in 1975, as a result of which the water level in the Euphrates valley and some of its upstream tributaries dramatically rose.

Adapted from Wikipedia (CC BY-SA). Photography via Wikimedia Commons.