Beaches, Outdoor Activities, Parks: Accessed via the Rickenbacker Causeway, this small island grants a rich taste of Miami's coastal charms. Crandon Park, on the northern end, is known for its marina, golf course, tennis center and beaches. The residential Village of Key Biscayne, in the center, offers exclusive boutiques, gourmet shops and art galleries. On the southern end, Bill Baggs Cape Florida State Recreation Park boasts its own superb beaches and historic Cape Florida Lighthouse. If you've got time coming or going, catch the marine exhibits, porpoise shows and impressive killer whales at the Seaquarium on Virginia Key.