When visiting Miami, one should allot some time for exploring the soft sand, palm tree-littered island of Key Biscayne. This tropical paradise offers idyllic beaches, recreation-filled parks and the country’s only federally-recognized underwater archeological trail, the Maritime Heritage Trail. Only accessible by boat, you’ll see the remains of six shipwrecks as well as the Fowey Rocks Lighthouse, a popular spot for snorkeling. Interestingly, Florida as a whole has an interesting network of underwater parks where you can explore wrecks and marine life. The two main parks visitors to Key Biscayne can visit include Crandon Park and Bill Baggs Cape Florida State Park.