The first of the Upper Keys reachable by car, 30-mile-long Key Largo is also the largest island in the chain. Key Largo—named Cayo Largo ("Long Key") by the Spanish—makes a great introduction to the region.
The history of Largo is similar to that of the rest of the Keys, with its succession of native people, pirates, wreckers, and developers. The first settlement on Key Largo was named Planter, back in the days of pineapple, and later, key lime plantations. For a time it was a convenient shipping port, but when the railroad arrived, Planter died on the vine. Today three communities—North Key Largo, Key Largo, and Tavernier—make up the whole of Key Largo.
If you've never tried diving, Key Largo is the perfect place to learn. Dozens of companies will be more than happy to show you the ropes. Nobody comes to Key Largo without visiting John Pennekamp Coral Reef State Park, one of the jewels of the state-park system. Also popular is the adjacent Key Largo National Marine Sanctuary, which encompasses about 190 square miles of coral reefs, sea grass beds, and mangrove estuaries. Both are good for underwater exploration.
Fishing is the other big draw, and world records are broken regularly. There are plenty of charter operations to help you find the big ones and teach you how to hook the elusive (but inedible) bonefish, sometimes known as the ghost fish. On land, restaurants will cook your catch or dish up their own offerings with inimitable style.
Key Largo offers all the conveniences of a major resort town, with most businesses lined up along Overseas Highway (U.S. 1), the four-lane highway that runs down the middle of the island. Cars whiz past at all hours—something to remember when you're booking a room. Most lodgings are on the highway, so you'll want to be as far from the road as possible.