Limited things to do. can probably get this one done in 4 hours or less.
Great site - allow 1 to 1.5 hours
Highlight of the cruise. Athens is very interesting and historical sites are great to see. Use a guide to maximize time there.
See my comments in review - a dissappointment. Taxi situation is deplorable - only 30 taxis for 2500 people. Time at stop is short so this would be a better destination if it was about 10 hours or so. Was not impressed with this one.