The Puente Romano is a Roman bridge over the Guadiana River at Mérida in southwest Spain.
It is the world's longest surviving bridge from ancient times, having once featured an estimated overall length of 755 m with 62 spans. Today, there are 60 spans on a length of 721 m between the abutments. Including the approaches, the structure totals 790 m. It is still in use, but was pedestrianized in 1991 as road traffic was redirected to use the nearby Lusitania Bridge.
Annexed to the bridge is the Alcazaba of Mérida, a Moorish fortification built in 835.
Wikipedia https://en.wikipedia.org/wiki/Puente_Romano,_Mérida
Address 9 Calle Tarraco, Mérida 06800, Spain
Coordinates 38°54'41.182" N -6°21'13.461" E