The Sanibel lighthouse complex at the eastern end of the island, looking north into San Carlos Bay. Twin water tanks are visible between the buildings. A cistern which collected rainwater from the roof can be seen beside the western quarters. A maintenance shed is beyond the western quarters, and the path to the boathouse/fishing pier is clearly visible. The submarine observation tower, used during World War II to search for enemy submarines, stands in the tidal zone on the island's Point Ybel, as erosion accelerated in the area during this period.