Key Largo is the kind of place where you'll spend more time on the water than on land — and that's exactly the point. As the first of the Florida Keys, it's built around mangroves, coral reefs and marine life, and three days is genuinely enough time to see the highlights without feeling rushed.
Day one kicks off with breakfast at The Hideout Restaurant, a waterfront diner that's been around for more than 20 years — think French toast, biscuits and gravy, or go local with a lobster omelet. Then it's on to John Pennekamp Coral Reef State Park, the first undersea park in the United States. Entry runs about $8 per vehicle plus a small per-person fee, and a morning here covers the visitor centre aquarium, an easy Mangrove Trail, and a swim at Cannon Beach. After a lobster roll lunch at Lazy Lobster, head ten minutes north to Dagny Johnson Key Largo Hammock Botanical State Park ($2.50 per person) to walk one of the largest remaining West Indian tropical hardwood forests in the US — bring water and insect repellent, as there's none on site. The day ends properly: a two-hour sunset cruise on a floating tiki bar with just six passengers, BYOB drinks and a cooler of ice waiting on board, departing from behind Snook's Bayside, where you can follow up with coconut shrimp and live music overlooking Florida Bay.
Day two belongs to the reef. A three-hour snorkelling tour out of Silent World Dive Center takes you into the Florida Keys National Marine Sanctuary to explore two coral reefs, where tropical fish, sea turtles, stingrays and nurse sharks are all on the menu — and, in good conditions, the famous underwater Christ of the Abyss statue near Dry Rocks. Equipment, reef-safe sunscreen, drinks and snacks are included, but you'll need to be a confident swimmer. Book the 11:15am slot, check in by 11am, and reward yourself afterwards with a late lunch at Alfredo's Cookhouse, a family-run spot with more than 50 dishes spanning Italian, Mexican, American and Japanese-inspired cooking.
Day three rounds things out with a guided kayak through the mangroves — manatee territory — followed by beach time at Harry Harris Park and a sunset dinner at the historic Caribbean Club.
One practical note worth planning around: Key Largo stretches along the Overseas Highway and public transport is thin on the ground, so a rental car makes the whole trip far easier. Book the tiki cruise and snorkel tour in advance and build the rest of your days around them.
This itinerary suits anyone after a low-key outdoorsy break — couples, small groups or solo travellers who'd rather snorkel than lounge. It's especially good value: apart from the tours, the big-ticket experiences here cost under $10 in park fees, and the food ranges from classic diners to proper seafood platters.