trajan's bridge at alcantara, roman bridge over the tagus river, alcantara, caceres, spain

bridge arch river waterway landmark viaduct transport architecture canal overpass reservoir ruins fortification monastery trajan39aph39s alcantara roman stone built tagus 104 106 caceres spain 2nd century ancient blue building construction culture estremadura europe exterior extremadura famous gate green heritage historic historical history landscape old outdoor puente rio road spanish structure tajo tejo tower trajan travel view water trajan#39aph39#s march 2024