There isn’t much to do on Aogashima though, except enjoy the serenity of a tropical paradise. In the center of the island lies a geothermal sauna. There is a public facility utilizing the geothermal power and gas and people use it to cook. This cooker using geothermal steam is available for free. Steamed fresh vegetables, potatoes or eggs are one of the specialties of Aogashima. The facility also features a sauna, a public bath, and hot showers.