I planned to go to Mount Lycabettus (the highest point in Athens) for sunset one night. I thought I'd allotted enough time, but everyone seemed to have the same idea since there was a huge line when I arrived.
Truthfully, I was a bit disappointed by the tram ride, and when I got to the top, I was overwhelmed by how many people there were. But the view made it worth it.
I ended up staying for dinner and had a delicious meal of Greek salad, moussaka, and white wine for about $16.