Shinzan Numa Observation Park The Shinzan Swamp was formed through over years through pyroclasic flow from several eruptions of volcano Mount Usu (110,000 years ago as well as the 1943-45 eruption forming Mount Showa-Shinzan). From the observation deck you can also check out the view over the town, as well as the small Mount "Donkoro" which is an accumulation of volcanic ejecta from Mount Usu. Toya-Usu Unesco Global Geopark The Toya-Usu Unesco Global Geopark is the geological heritage represented by the Toya Caldera and volcano Mount Usu. It's natural as well as cultural heritage displays the history of the Jomon people through time up to the Ainu people (indigenous people of Hokkaido), and lets you experience first-hand the relationship between the volcano and human life.