If you have time a visit to Bill Baggs State Park on Key Biscayne is a lovely way to spend an hour or two. The park itself has some lovely walks. a lovely restaurant at No Name Harbour where you can sit and watch the few boats (never seem to be that many moored up) and then afterwards there are the guided tours up the lighthouse where you can view stunning views over the coastal area. The lighthouse keeper's cottage is also available to look round.