Key Biscayne is accessible via the Rickenbacker Causeway and by boat. Visitors can dock at the Key Biscayne Yacht Club, which hosts races and regattas. Aside from pristine beaches, Crandon Park and Bill Baggs Cape Florida State Park feature tropical flora and fauna. The state park’s lighthouse is the county’s oldest standing structure. The Miami Seaquarium is north of Key Biscayne on Virginia Key.