We usually do beachy-type activities in Aruba. This year,since our stop was only half a day, we didn't have time to go to the beach. We did a little walking and people-watching.
We took the train from Colon to Panama City- what a waste of money! It cost us $149/person, and we all thought we'd see the locks from the Pacific Ocean. Wrong!- we were dropped off at a shopping center for an hour!! I heard the boat trip in Gatun Lake was very interesting, and people who stayed on the ship and watched the ship going back out of the locks said it was interesting.