Roman Bridge of Chaves built
100 CE.
Shown on the map at 41.738°, -7.467°.
Trajan's Bridge (Portuguese: Ponte de Trajano) is a Roman bridge in the civil parish of Santa Maria Maior, in the municipality of Chaves in the Portuguese northern subregion of Terras de Trás-os-Montes.
Text from the Wikipedia article Roman Bridge of Chaves, licensed CC BY-SA 4.0.