Puente Romano, Mérida

The Puente Romano is a Roman bridge over the Guadiana River at Mérida, southwest Spain, and the world's longest surviving bridge from antiquity. Originally built in the 1st century BC when Emerita Augusta was founded, it once spanned 755 metres with 62 arches. Today 60 spans remain across 721 metres, with three buried on the southern bank. The granite and Roman concrete structure underwent restorations by the Visigoth Sala in 686 and Philip II in 1610. Part of the UNESCO World Heritage ensemble of Mérida, it was pedestrianized in 1991.