1972 Map of Marathon

Navigational and coastal features dominate the surrounding waters of Florida Bay and the Straits of Florida. Detailed hydrographic data highlights treacherous areas such as East Washerwomen Shoal and Delta Shoal, while the intricate shoreline reveals Boot Key Harbor and the Coast Guard Sta near Hog Key. This unique aerial perspective provides a precise look at the dredging and land-shaping that defined the Keys' mid-century expansion, from the residential fingers of Tingler Island to the isolated Sombrero Key to the south.