This is Hartford Cave, near Rum Cay, in the Bahamas. It is a protected historical site of The Bahamas and was discovered by Rum Cay residents, who would go there to collect bat droppings for use as fertilizer. They sometimes found utensils like clay plates, cups, and bowls underneath the rich carpet of guano, which were later found to be Lucayan-Arawak in origin. The walls of the cave are decorated with ancient petroglyphs from those tribes, and some also have writing from colonial times.
