I have been to Panama City once -- and went on the Grand Tour of the locks but for the life of me can't remember the dock. Is it a place where you can get off and just walk around? There are not many excursions to choose from!
We were there in April, and yes the Miracle docked next to a place where you could just walk around in the shops. They also had some local people performing a dance while we waited in line to re-board the ship.