Athens has an efficient public transportation system that includes metro, bus, tram, and trolleybus services. You can purchase a multi-day ticket for unlimited travel on all modes of transport. Walking is also a great way to experience the city's beauty and culture. Taxis are readily available, but they can be expensive during peak hours.
If you have more time, visit the National Archaeological Museum or the Ancient Agora. For less time, skip the Plaka neighborhood or the Acropolis Museum. Make sure to wear comfortable shoes while visiting the Acropolis as the terrain can be steep and rocky.
Athens International Airport (ATH) is located 20 kilometers east of the city center. The fastest way to get to the city is by metro, which takes around 40 minutes and costs about $12. Alternatively, you can take the airport bus or a taxi.