Stuck in Athens for 3 days

Was supposed to fly home today from Naples via Athens but my flight got cancelled and the next one out isn’t till Thursday. A very stressful and emotional afternoon trying to figure out what to do at the airport later I’ve now gotten a hotel in Athens but without much of a clue about the city or what I’m going to do for the next 3 days .

I’ve been to Athens once before and I’m not much of a history person so all the ancient sites didn’t really do much for me. Does anyone have any suggestion of what I could do or see? I love nature and cheap street food . Thanks a lot in advance.

Stuck in Athens for 3 days