Everglades National Park
One-and-a-half million acres in Florida (US) managed by the National Park Service.
Each edition grades its towns against each other only.

Each year, some 778K people go to Everglades National Park. There is no place to visit inside Duck Key; there are 4 within 40 miles. Among them are 2 zoos & aquariums, a national park and a state park. Make a day of it at Ernest Hemingway House, 58 mi away.

One-and-a-half million acres in Florida (US) managed by the National Park Service.
The towns around it, and where to stay →
The map puts most of the 4 to the northeast.
Orange: Duck Key. Numbers: the best-known places, matching the list below. © OpenStreetMap contributors
The list runs to 22 places, all within 60 miles.
One-and-a-half million acres in Florida (US) managed by the National Park Service.
180,000 acres of mostly waterways, in Florida (US), managed by the National Park Service.
729,000-acre area in Florida (US) managed by the National Park Service.
Florida State Park and National Historic Landmark centered on a Civil War-era fort in Key West, Florida.
Historic site in Key West, Florida, USA; winter White House for Harry S. Truman.
State park located on Key Largo, Florida, USA.
Historic site in Key West, Florida, USA.
Place in Florida listed on National Register of Historic Places.
Cuban heritage center and museum in Key West, Florida.
Arboretum and botanical garden in Key West, Florida.
Ranked by how many people look them up, so the famous places lead and the local favorites follow.
Parks and trails in Duck Key → · Duck Key’s history →
Everglades National Park: Everglades NPS from Homestead, Florida, United States, Public domain · Ernest Hemingway House: Andreas Lamecker, CC BY 2.5 · Biscayne National Park: National Park Service, Public domain · Big Cypress National Preserve: Gzzz, CC BY-SA 4.0 · Southernmost point buoy: Radomianin, CC BY-SA 4.0 · Fort Zachary Taylor Historic State Park: U.S. Department of Transportation, Public domain · Harry S. Truman Little White House: Bubba73, CC BY-SA 3.0 · John Pennekamp Coral Reef State Park: Jim Stuby (talk), Public domain · Martello Gallery-Key West Art and Historical Museum: Averette at en.wikipedia, CC BY 3.0 · Mel Fisher Maritime Heritage Museum: Averette, CC BY-SA 3.0 · Anhinga Trail: Unknown, Public domain · Everglades Alligator Farm: Daderot, CC0 · Fruit and Spice Park: Asit K. Ghosh Thaumaturgist, CC BY-SA 3.0 · Key West Aquarium: Marc Averette, CC BY-SA 3.0 · San Carlos Institute: Avbelli, CC BY-SA 4.0 · Theater of the Sea: Averette, CC BY 3.0 · Key West Shipwreck Museum: Marc Averette, CC BY-SA 3.0 · Florida Pioneer Museum: Ebyabe, CC BY-SA 3.0 · Key West Tropical Forest & Botanical Garden: Deror avi, Attribution · Seminole Cafe and Hotel: Ebyabe, CC BY-SA 3.0