Marathon shines in beaches and fishing. Sombrero beach is one of the most beloved in the Keys, and comes with great snorkeling as well. If you decide you desire more than those activities, then try a kayak or hike through rich nature preserves, where herons wade, ospreys perch and giant land crabs peek from their burrows. Explore historic buildings, soak in the endless ocean horizon views atop the Seven Mile Bridge, swim with dolphins or get to know the residents at the renowned Turtle Hospital. Bicycle the Overseas Heritage Trail, play around on waverunners, join a happy-hour pool party, try a sunset cruise or embark on one of our favorite afternoon vacation activities — a long nap in a shady hammock. Those are just a few of the possibilities, so scroll down for more.