The Bahia Honda Rail Bridge is an abandoned bridge in the lower Florida Keys connecting Bahia Honda Key with Spanish Harbor Key. The bridge was originally built between 1905 and 1912 by billionaire Henry Flagler, who was a partner in Standard Oil with John D. Rockerfeller, as part of the Overseas Railroad. It was intended to carry a single track of the Florida East Coast Railway across the Big Spanish Channel from Bahia Honda Key to Spanish Harbor Key. Due to the channel’s depth, being 24-feet at it’s deepest point, the Bahia Honda Bridge was built with a steel truss construction as apposed to a concrete arch form that was predominate throughout the Overseas Railway.

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