Athens is dominated by the flat-topped hill of the Acropolis, which is the site of the 2400 year old Parthenon, one of the most famous classical monuments in the world. On the far side of the Acropolis is the restored Odeon of Herodes Atticus, a superb theatre in which the open-air performances of the International Athens Festival are held from June to September. The centre of Athens has many modern shops, restaurants, international-class hotels and nightclubs. The old quarter of the town, Plaka, which spreads around the Acropolis, is picturesque with its famed flea market, small tavernas, craft shops and narrow winding alleys.