But good ole Mother Nature gave her answer during the Hurricane of 1935 when she blasted her way (200 mph winds do blast!) through these causeways and reconnected the ocean side of the keys with the bay side. Thus the MANY bridges of the Overseas Highway from Key Largo to Jimmy Buffett's Margaritaville.
There were only 5 streets, and I loved the sign for "Forth St.".
After the self-guided tour of Indian Key, we motored to nearby Lignumvitae Key, where we really enjoyed an hour and a half tour with an extremely knowledgeable park ranger. This is what the Keys would have looked like if Flagler and future vacationers never arrived. After out tour, we recognize trees such as lingumvitae, gumbo-limbo, poisonwood, mastic, and strangler fig. Perhaps "Tropical Trees" that will be a category on Jeopardy some day and we can look intelligent!