There are many interesting things to see in Miami. Do they offer an excursion to Villa Viscaya? Crandon Park Zoo? South Beach? Seaquarium? Everglades? As Dave said, Bayside isn't that bad, either. We were in Coral Gables, which had some nice shopping areas, but I prefer South Beach. There are plenty of cabs available at the port, there is the Tri-Rail
system, and the bus that Cruise Fanatic mentioned. Hope this helps some.