There’s more to Monastiraki than its bustling Ifestou Street flea market, filled with endless souvenirs. Ancient highlights include Hadrian’s Library, the Stoa of Attalos, and the nearby Ancient Agora of Athens. On weekends, Athenians head down the western end of Ermou Street, and its side streets, to scour vintage stores and thrift shops for one-of-a-kind treasures, ranging from upcycled clothing to rare vinyls. Avissinias Square is a favorite haunt, but don’t expect bargains; on Sundays, the open-air bazaar becomes a festive, music-filled affair. Once you’ve sourced your take-home keepsake, head up to one of the many attractive rooftop cafés and cocktail bars and marvel at an illuminated Parthenon.