Things to do in Grassy Key
Activities, attractions and tours
Visit Grassy Key
Explore activitiesExplore thousands of experiences from activities and attractions to day tours and transfer.
Book with easeSkip the line- book tickets online in minutes to top attractions with free cancellation on many activities.
Treat yourselfMembers save % or more when you book activities.
What to do in Grassy Key
Popular places to visit
Dolphin Research Center
Learn about the playful nature of dolphins before swimming alongside these clever marine mammals at this entertaining research facility.
Sombrero Beach
Play beach games; go swimming, kayaking or snorkeling; and lounge in the sun at one of Marathon’s most visited beaches.
Seven Mile Bridge
Walk, jog, cycle or drive across one of the longest bridges in North America to take in the scenic ocean views it provides.
Vaca Key
Commune with nature and explore the great outdoors at Vaca Key during your travels in Marathon. Stroll along the seaside or discover the area's beautiful sunsets.
Curry Hammock State Park
Go camping near mangroves, bird-watching beneath a thick canopy or kayaking between the islands of this scenic state park in the Middle Keys.
Coco Plum Beach
Why not spend a lazy afternoon at Coco Plum Beach during your trip to Marathon? Discover the area's beautiful sunsets or seek out its jogging trails.
The Turtle Hospital
Explore the campus of The Turtle Hospital as part of your travels around Marathon. Stroll along the area's seaside or simply savour its seafood restaurants.
Crane Point Museum and Nature Center
You can spend an afternoon exploring the galleries in Crane Point Museum and Nature Center in Marathon. Discover the area's beautiful sunsets or seek out its jogging trails.
Boot Key Harbor
Commune with nature and explore the great outdoors at Boot Key Harbor during your travels in Marathon. Discover the area's beautiful sunsets and seafood restaurants.
Looking for fun things to do nearby? Check things to do near me to find and book the best things to do, fun activities, and top attractions wherever you happen to be.
