Unlike almost everyone there, I didn’t go to the Florida Keys to dive or fish. I went there to follow the path of a railroad that once left the continent and traversed miles of open water and uninhabited tiny islands to reach Key West. The railroad was built between 1904 and 1912 and blew away in a hurricane in 1935. Subsequently its bridges and roadbed were rebuilt into the highway that connects the Keys. The railroad was the final creation of Henry Morrison Flagler, who sat at the right hand of John D. Rockefeller during the golden age of Standard Oil and used his resulting millions to build up Florida. In 1904 he decided that if he pushed his Florida East Coast Railway down from Miami to Key West, that island’s deep harbor could become the most important port on the Gulf of Mexico. He said at one point, “It is perfectly simple. All you have to do is build one concrete arch and then another, and pretty soon you will find yourself in Key West.” The railroad took the same route that you now take by car.