Things to do in Grassy Key
Find and book 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.
Most popular activities in Grassy Key
Tours & day trips
See all 12 activities
Mangroves and Manatees - Guided Kayak Eco Tour
Water activities
See all 6 activitiesMangroves and Manatees - Guided Kayak Eco Tour
Adventure & outdoor
See all 3 activities
Marathon Florida Keys Fishing Experience
What to do in Grassy Key
Discover the most popular places to visit in Grassy Key
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 during your stay in Marathon. Stroll along the area's beautiful beaches, or simply savor 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.
- Places to visit
- Hotels near popular Marathon Attractions
- Nearby cities for things to do
- Expedia's Latest Trends
Expedia's Latest Trends
- St Giles Hotel - London
- Hatori
- Yunoshimakan
- Rembrandt Hotel Ebina
- Ajisai Onsen Ryokan - Award Winning Private Open Air Onsen Hakone
- Hotel Nord Otaru
- Capsule Inn Kinshicho
- Redac Gateway Hotel In Torrance
- bnb+ Yokohama Motomachi - Hostel
- Waterpark Hotels in Okinawa Island
- Urban Villa Konaya Hotel
- Hotels near Futamatagawa Station
- Novotel Chiangmai Nimman Journeyhub
- Cheap Hotels in Namba
- Hotels near Imaichi Station
- Sotetsu Fresa Inn Chiba Kashiwa
- Rembrandt Premium Fuji Gotemba
- Flights from San Francisco (SFO) to Chicago (ORD)
- Flights from Manchester (MAN) to Haidong (XNN)
- Flights from Bengaluru (BLR) to Osaka (KIX)
- Flights from Tashkent (TAS) to Urgench (UGC)
- Flights from Osaka (KIX) to Los Angeles (LAX)
- Flights from Chubu Centrair Intl. to LON-All Airports
- Flights from Narita (NRT) to Bengaluru (BLR)
- Flights from San Francisco (SFO) to Sapporo (CTS)
- Flights from Frankfurt (FRA) to Tokyo (HND)
