Private boat trips on 22-foot powerboats are a fantastic way to explore the bays and waterways of Miami, if you can afford it. There are also beautiful yachts and catamarans for rent. Tour Biscayne Bay or even go as far as Bimini in the Bahamas. Among the best tours: "Islands of the Rich and Famous," in which you cruise past Star Island, Hibiscus Island, Fisher Island, and Palm Island. Keep your eyes open -- Star Island resident Rosie O'Donnell always goes jet-skiing out by these boats. A sunset cruise of Miami is also highly recommended. We hear that Tropicalboat Charters are a popular activity among visiting celebrities who relish their privacy -- even on the high seas.