There's much to like about this 5-acre island under the Old Seven Mile Bridge. You can reach it by walking across a 2¼-mi section of the bridge or by ferry. Once there, tour the island on your own or join a guided tour. The tour explores the buildings that formed the early-20th-century work camp for the Overseas Railroad that linked the mainland to Key West. Later the island became a fish camp, a state park, and then government-administration headquarters. Exhibits in a small museum recall the history of the Keys, the railroad, and railroad baron Henry M. Flagler. Pick up the ferry outside the gift shop, which occupies an old railroad car on Knight's Key (MM 47 OS).
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