The magnificent Acropolis, visible from almost every part of the city, is the hub around which Athens still revolves. This temple city, built in the 5th century BC, serves as a daily reminder to Greeks of their heritage and the city's many transformations. The cultural and social life of Athens plays out amid, around and in landmarks that are centuries old, if not millennia. Beyond Athens, down the Attica peninsula, are more spectacular antiquities, such as the Temple of Poseidon at Sounion and the site of Ancient Eleusis, as well as very good beaches, such as those near historical Marathon.