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 beautiful beaches or discover the area's beautiful sunsets.

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.

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.

The Turtle Hospital
Explore the campus of The Turtle Hospital as part of your travels around Marathon. Stroll along the area's beautiful beaches 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.
Explore a world of travel with Expedia
- Hotels with Swimming Pools in Big Pine Key
- Big Pine Key Hotels
- Resorts in Big Pine Key
- Conch Key Hotels
- Hotels with Bars / Lounges in Cudjoe Key
- Private Holiday Homes in Duck Key
- Boutique Hotels in Duck Key
- Budget Hotels in Duck Key
- Hotels with Swimming Pools in Duck Key
- Scuba Diving Hotels in Duck Key
- Hotels near Shopping Areas in Duck Key
- Hotels with Spa in Duck Key
- Resorts in Duck Key
- Villas in Duck Key
- Hotels near Everglades National Park
- Flamingo Hotels
- Hotels near Florida Keys Marathon
- Cottages in Islamorada
- Gay friendly Hotels in Islamorada
- Hotels with Yoga in Islamorada
- Hotels with Spa in Islamorada
- Hotels with Swimming Pools in Key Colony Beach
- Beach Resorts in Layton
- Hotels with Swimming Pools in Layton
- Layton Hotels
- Capsule Hotels in Lignumvitae Key Botanical State Park
- Resorts in Lignumvitae Key Botanical State Park
- Castles in Little Torch Key
- Scuba Diving Hotels in Little Torch Key
- Apartments in Long Key
- Long Key Hotels
- Hotels near Long Key State Park
- Beach Resorts in Lower Keys
- Resorts in Lower Matecumbe Key
- Cottages in Marathon
- Hotels with Childcare in Marathon
- Hotels with kitchenette in Marathon
- Romantic Hotels in Marathon
- Marathon Hotels
- Gay friendly Hotels in Marathon Shores
- Cottages in No Name Key
- Summerland Key Hotels
- Tavernier Hotels
- Resorts in Upper Matecumbe Key
- Hersha Hospitality Hotels in Windley Key
- Flights to Duck Key
- Flights to Little Torch Key
- Flights to Marathon
- Flights from Little Torch Key
- Flights from Long Key
- Flights from Marathon
- Flights from Flamingo
- Flights from Plantation Key
- Flights from Big Torch Key
- Flights from Melody Key
- Flights from Middle Torch Key
- Flights from Beirut (BEY) to Marathon (MTH)
- Flights from Jacksonville (VQQ) to Marathon (MTH)
- Visit Eden Pines
- Big Pine Key Flea Market
- Visit Duck Key
- Everglades National Park
- Founders Park
- Harry Harris Park
- History of Diving Museum
- Islamorada Holidays
- Visit Islamorada
- Visit Long Key
- Visit Marathon
- Sombrero Beach
- Visit Sugarloaf Key
- Sunset Drive Beach
- Sunset Park Beach
- Visit Hammer Point
- Visit Tavernier
- Rental cars Florida Keys Marathon airport
- Economy Rent a Car Rental Cars in Little Torch Key
- Fox Rental Cars Rental Cars in Grassy Key
- Localiza Rental Cars in Middle Torch Key
- Mex Rent A Car Rental Cars in Cudjoe Key
- Midway Car Rental Rental Cars in Sugarloaf Key
- Sicily By Car Rental Cars in Upper Matecumbe Key
- Thrifty Car Rental Rental Cars in No Name Key
- Zezgo Rental Cars in Bahia Honda Key






