At Marathon's Crane Point, visitors can hike through a wondrously preserved tropical hardwood grove and visit the home of an early 20th Century settler family.
Sombrero Reef, a federally protected section of North America's only living coral barrier reef, lies just a few miles offshore. Beyond it are the deep blue waters of the Florida Straits, which teem with billfish and tuna in the winter and dolphin fish in the summer. On the north side of the island lie the calm waters of the Gulf of Mexico, Florida Bay and the Keys backcountry.