NAPLES, FLORIDA—A canal that was probably used as a shortcut for transporting goods by the Calusa has been dated to between 800 and 1100 A.D. Robert Carr, executive director of the Archaeological and Historical Conservancy, said that the canal is part of a complex web of canals in southern Florida. This section of the canal was found with ground-penetrating radar in the center of modern Naples. “These canals are the only transportation canals in North America outside of Mexico. So, in that sense they are a major engineering marvel that indigenous people have constructed,” he told WGCU.