Considered the symbol of Athens and Greece, and indeed of Western civilisation, the Acropolis is a rocky mound rising in the heart of modern Athens and crowned by three magnificent temples dating from the 5th century BC. The best known and most distinctive is the Parthenon, originally made up of 58 columns supporting a roof and decorated by ornate pediments and a frieze. The so-called Archaeological Promenade is a two-and-a-half-kilometer walkway, which skirts the foot of the Acropolis and connects it to the city's other main ancient attractions - the Ancient Agora , the Roman Forum, Kerameikos, and the Temple of Olympian Zeus.