Big Pine Key's First Mile Marker

According to the Florida Keys History Web Site by Jerry Wilkinson, "Mile Markers (MM) is a relative location of a site in reference to the number of miles north of Key West. The business center of unincorporated Key Largo is at about MM 100; therefore, about 100 miles northeast of Key West. The Florida DOT tries to maintain small rectangular green with white number mile marker signs every mile on both sides of the highway."

"I assume this practice began with Henry Flagler who numbered every mile of railroad beginning at Jacksonville and ending at Key West. They were white and black concrete Mile Post signs along the railroad track and on the printed timetables."

This picture is of one of the few, maybe the only, of those early MM signs still existing. It is of course in Big Pine Key, MM 30. Have you seen it?