The panathenaic stadium is great. We did it a couple of weeks ago.
Keep your wallet and phones in front pockets = must do!!!
We walked up Lebbeticus hill, the highest part of the city with fantastic 360 views, which help you visualise the vastness of the city
Crazy, ugly, amazing city! The amphitheatre at Epidauros is incredible, but a little way out of town.
The metro is excellent. €4.20 for 24 hrs.
We had 3 nights there, and did plenty, but I was glad to get out of the place, to be honest