If you have two days to explore Athens, make sure to take all four routes of the Sights of Athens hop-on hop-off tour to make the most out of your trip. Here is a possible itinerary that incorporates all four routes:
Day 1 - Orange and Blue Lines: Your tour will begin at Syntagma Square, Old Parliament, as you catch the bus towards the Acropolis Parthenon. After your stroll through the Acropolis, shift to the Blue Line for the Piraeus Cruise, which includes a visit to the planetarium, a close view of the Temple of Poseidon, and a few extra stops. You can get back to the Orange Line at the Acropolis to continue your tour of the city and its attractions. The Old Town of Plaka, which lies close to the Acropolis, is home to several local-run taverns that offer Greek delicacies such as Keftedes (Greek-style meatballs) and Tzatziki (a cucumber-garlic dip).