Torre de Hércules in A coruña. It's the oldest extant lighthouse known. It has an ancient Roman origin on a peninsula about 2.4 km from the center of A Coruña, Galicia, in north-western Spain.

picture was taken from: https://bluscus.es/la-torre-de-hercules-fuerza-de-un-faro-patrimonio-de-la-humanidad/