A great day in the Florida Keys is kayaking Marathon and wild Boot Key island, where you wind through narrow mangrove tunnels and over peaceful lagoons. The unmarked trail is a fun challenge to navigate.
Curry Hammock State Park is a hidden island in the Florida Keys near Marathon right off US 1. It has excellent camping and a swimming beach safe for kids. The park offers a kayak trail that is perfect for a short, inexpensive paddling experience. (They rent kayaks and SUPs.)
Every fall, the skies over the Florida Keys fill with thousands of birds from hundreds of species heading south for the winter. A remarkable citizen science project, Hawkwatch, based in Curry Hammock State Park, keeps a tally.