The Roman Bridge of Alcántara is a magnificent work of engineering. It was built 106 years BC by Gaius Julius Lacer. It is 57 meters high and 214 meters long and 8 meters wide. In the central part there is a Triumphal Arch.
Roman bridge above the Wadi al-Murr near Mosul, Iraq. Photo by the German archaeologist Max von Oppenheim researching the ancient city of Tell Halaf, First publication: National Geographic, November 2009
Witness the clear waters of the Verzasca River in Switzerland. Under the bridge: This stunning photo by Claudio Gazzaroli, shows the arched Roman Bridge crossing over the Verzasca River in Switzerland from under water