triumphal arch of the trajan's bridge at alcantara, cáceres, spain

bridge arch landmark architecture ruins fortification waterway wall monastery transport viaduct tourism river history monument triumphal trajan#39aph39#s alcantara roman stone small temple left bank background alcántara cáceres spain march 2024 2nd century ad alcantara alcántara ancient arch architecture blue bridge building caceres construction culture cáceres estremadura europe exterior extremadura famous fortification gate green heritage historic historical history landmark landscape old outdoor puente rio river road roman sky spain spanish stone structure tagus tajo tejo temple tower trajan travel triumphal view water