Driving out-of-town friends around Miami doesn't really give them the full flavor of this surreal subtropical metropolis. There is nothing more exhilarating than taking a powerboat cruise on Biscayne Bay, where you can tour the coastlines of Key Biscayne, Coconut Grove, Miami Beach, Surfside, Bal Harbour, Haulover Beach, and Sunny Isles Beach. With three docking stations, Miami Yacht Charters has a wide variety of power boat rentals to choose from. The fleet includes Sea Ray Sundancers and Sedans ranging in size from 36 to 51 feet. A minimum three-day excursion costs about $3,200 to $4,000, but split among a group of four to six people, the price is worth it. For the true oceanic baller, there's a fleet of motor yachts piloted by captains, so you don't have to worry about navigating Government Cut or cutting back on those rum drinks you like so much. The vessels include a 55-foot Ferretti, a 60-foot Viking Cruiser, and a 77-foot Millennium Sport Yacht. On these beauties, price packages vary; the least expensive is a four-hour trip for $2,800. If you're feeling like Kanye West, throw down 30 Gs for a weeklong excursion on the Millennium, and get a free tender or WaveRunner rental. A security deposit is required.