Long before the drive down U.S. 1 became a classic Florida road trip, the Florida Keys were transformed by an audacious rail project: Henry Flagler’s Over-Sea Railroad. Completed in 1912, the line connected Key West to mainland Florida and helped reshape commerce, tourism, and daily life across the island chain. Historians still point to it as one of the most important turning points in Florida Keys history.
Often called “Flagler’s Folly” during construction, the Over-Sea Railroad stretched more than 100 miles over open water and remote islands. The feat linked communities that had long been difficult to reach, including parts of what travelers now know as the Upper Keys. The new rail connection made it easier to move people, goods, and mail, and it helped accelerate settlement and tourism throughout the Keys.
Why the Over-Sea Railroad Mattered
The railroad did more than create a transportation link. It helped make the modern Florida Keys by:
- Connecting the islands: The line tied Key West and the rest of the Keys more closely to the mainland economy.
- Boosting tourism: Easier access brought more visitors and helped grow the Keys as a destination.
- Shaping future travel: After the railroad was destroyed in the 1935 Labor Day Hurricane, parts of its route and infrastructure were adapted for what became the Overseas Highway.
That last point is especially important. The 1935 hurricane devastated the Keys and severely damaged the railroad, bringing the rail era to an end. But the story did not stop there. Its bridges, embankments, and right-of-way helped lay the groundwork for the highway travelers still use today, turning a rail corridor into the backbone of Florida Keys travel.
Where to Learn More in the Keys
Looking for more Florida Keys history? Visit us at the Florida Keys History & Discovery Center! Located in Islamorada on the historic Islander Resort property, the Center highlights the history of the Florida Keys through exhibits and educational experiences, making it a smart addition to any itinerary through the Upper Keys. The museum is open Tuesday through Sunday and offers visitors a deeper look at the people, industries, and defining events that shaped the island chain.
