Acropolis
The Acropolis is a large fortified hill in the center of Athens, and it houses several ancient structures, including the Parthenon, The Erechtheio, The Temple of Athena Nike, The Theatre of Dionysos, and Odeon of Herodes Atticus (amphitheater of Herodium).
It was European Heritage Days so we were able to get into all the sites and the museum for free!! And it wasn’t even that crowded!