I looked for somewhere to go that would be quick, easy and inexpensive. I've been to Hydra and that would entail to much time getting there and back, same for Aegina which I feel would be better for a couple days at least.
Piraeus popped into my head. Many people consider it ugly and just a place to go for a ferry.
After research I decided there's more to Piraeus than meets the eye.
I took the Metro from Monistiraki Square for 1.40 euros and got to Piraeus in about 20 minutes.
I headed outside the station which in itself is quite different and amazing for a Metro Station and walked to the waterfront and saw all the gates, ferries and noise.
My goal was to walk to Zea Marina and Mikrolimano. In a little while the scenery got a little better and in fact turned out to be rather pleasant for a city experience. Zea Marina was filled with pleasure boats and a few fishing boats bringing in the day's catch. Lots of taverns, shops, and markets along the way and less tourist presence and in fact somewhat laid back and decent scenery. It was late morning but compared to Athens very quiet.
I continued walking and got to the beginning of Mikrolimano and it was also very nice, maybe a bit larger and more upscale but still not bad. It was getting late so I decided to turn back and took a side street for the Archeological Museum but since it was Monday knew it was closed but there is a nice fenced off area filled with artifacts which were easy to see then returned to the waterfront and headed back to the Metro Station.
However, I did stop at Souvlaki 24, a grill house recommended to me and had one of the best and least expensive lunches/meals I've had in Greece for 7.90 including a large Greek Beer.
On the way back I stopped at Piraeus' Central Markets which is similar but smaller than Athens' Market.
Went to the Metro Station, got my ticket, walked to the platform and in 5 minutes the Metro came and returned me to Athens.
Piraeus turned out to be a nice way to spend a few hours without a lot of expensive, travel and quickly.
You may want to consider Piraeus which has more to offer than a way to get to a Greek Island.
Check out this website for Piraeus: