A natural cave of impressive size with thousands of Resident Island swiftlet birds, it is the only residing place for this type of bird, which easily number in the hundreds. At the base of the cave is a pool of guano, accumulated over the decades, which locals use as a high-nutrient additive to the ubiquitous Kosrae home gardens in all of the villages. Legends say this cave to be home to a family of real giants, and that the cave goes through a tunnel to the other side of the island. Easy to get too just off the main road, it is truly a rare and awesome sight.