On the sea floor of the Sargasso Sea, near the coast of the island Bimini in the north of the Bahamas, there is an enormous megalithic construction. The huge dimensions resemble the megalithic walls of Sacsayhuaman near Cusco in Peru, but these are buried in the ocean sand. If this is indeed a similar wall, then it once must have been above ground. But that must have been more than 10000 years ago since in those ancient days the ocean floor of the Caribbean was much more elevated than it is now.