Things to Do in the Florida Keys: The Reef, the Key Deer, and the Drive Itself

The Florida Keys National Marine Sanctuary: Why Reef Access Is a Chain-Wide Activity

The Florida Keys National Marine Sanctuary, established in 1990, spans nearly the entire reef tract running the length of the 113-mile chain -- described by NOAA's Office of National Marine Sanctuaries as the nation's largest marine sanctuary system of its kind. It absorbed two earlier, smaller sanctuaries, the Key Largo National Marine Sanctuary and the Looe Key National Marine Sanctuary, folding them into one region-wide protected area rather than a patchwork of separate reef preserves near individual towns.

That's the practical reason snorkeling and diving read as a defining Florida Keys activity rather than a single-town attraction: the reef the sanctuary protects runs alongside nearly the whole chain, so reef access is available from the Upper Keys down through the Lower Keys, not concentrated at one location. This page did not independently confirm the sanctuary's exact square-mileage figure or a specific list of named dive sites, reef breaks, or tour operators -- those specifics belong to each community's own page and to the sanctuary's own current visitor information, not to a chain-wide overview like this one.

The National Key Deer Refuge: A Lower Keys Wildlife-Viewing Destination Found Nowhere Else

Centered on Big Pine Key and No Name Key in the Lower Keys, the National Key Deer Refuge protects the Key deer, a diminutive white-tailed deer subspecies confirmed by the U.S. Fish & Wildlife Service and the Florida Fish and Wildlife Conservation Commission as endemic to this part of the Keys -- meaning it exists nowhere else on Earth. Monroe County maintains its own Key Deer Habitat Conservation Plan specifically covering Big Pine and No Name Key, underscoring that this is a genuinely regional, Lower-Keys-wide conservation story rather than a single roadside attraction.

For visitors, that makes the refuge a legitimately distinctive things-to-do stop: a wildlife-viewing opportunity that doesn't exist anywhere outside this stretch of the Lower Keys. This page did not independently confirm a current Key deer population estimate, the refuge's exact acreage, or its founding year -- confirm those figures, along with current refuge hours and access rules, directly with the U.S. Fish & Wildlife Service before planning a visit.

The Overseas Highway: A Mile-Marker Drive That's an Attraction in Its Own Right

The Overseas Highway (US-1/State Road 5) runs on green mile-marker (MM) signs from MM 0 in Key West to roughly MM 126 near Florida City on the mainland, covering the chain's roughly 113 miles. That mile-marker system isn't just a navigation quirk -- real estate listings, marinas, and restaurants across the entire Keys use "MM" numbers as their primary locator, since many Keys properties were never assigned conventional street addresses, a genuinely chain-wide convention confirmed across multiple independent Keys travel and real-estate guides.

Driving the length of it is worth calling out as an activity of its own, not just the means of reaching a destination: a single highway crossing open water between islands for most of its length, oriented the whole way by those green mile-marker signs, is not a road-trip experience available anywhere else in the country. This page did not independently confirm specific scenic overlooks, named bridges, or rest stops along the route beyond the mile-marker system itself -- treat the drive's overall character as the sourced claim, and look to each community's own page or a current Keys travel guide for turn-by-turn specifics.

For Town-Specific Attractions, See Key West's and Islamorada's Own Pages

This page deliberately stays chain-wide. Key West's landmarks -- the Hemingway Home & Museum, Mallory Square's Sunset Celebration, the Southernmost Point marker, Duval Street, and Fort Zachary Taylor -- are covered in depth on Key West's own things-to-do page, not repeated here. Islamorada's own attractions and its "Sport Fishing Capital of the World" identity belong on its own page as that page is built out. As more Keys communities -- Marathon, Key Largo, Big Pine Key, and others -- get their own dedicated pages on this site, their town-specific things-to-do content will live there too.

Before You Visit

Access rules, seasonal closures, and current visitor information for both the Florida Keys National Marine Sanctuary and the National Key Deer Refuge change by season and can change without much notice. Check directly with NOAA's Office of National Marine Sanctuaries (floridakeys.noaa.gov) and the U.S. Fish & Wildlife Service's refuge page before planning a trip around either, rather than relying on any single third-party source, including this one.