Is there anything to do in Miami for a couple of hours? I will probably have a couple of hours (3-4) between getting off the cruise and heading off to the airport and I'm not sure what to do!
Considering you'll have your luggage in tow, your best bet may be to sign up for a post-cruise shore excursion with the cruise line. They often have a choice of them. Your luggage would then most likely ride on the bus with you, and the bus will take you to the airport at the end of the tour. Just make sure you check the tour's time length!
Karen has a good suggestion. The problem is your luggage. The only other thing is to rent a car, and there's not much time to do anything if you don't know your way around.
kj-We did a post cruise tour with RCL in Dec 05-Our bags stayed aboard the tour bus and they dropped us at the airport at the end of the tour-check with the cruise line to be sure that 3-4 hours is enough time!