A wildlife sanctuary, Asuncion has very developed vegetation, with forests of coconuts and other native trees. They say there is a hot spring on the island. A concrete building made by former Japanese settlers catches fresh drinking water; however, there are no dwellings. You'll see evidence of coconut crabs as you step through shredded nests of coconut husks. The top of the volcano is often in the clouds. A notch in the mouth of the volcano shows where lava once drooled out over the side.