It spreads on the northern flank of Mt. It is a blast-mouth mark when the slopes of Kamiyama [Kamiyama] exploded about 3,000 years ago, and plumes still rise from the earth. Until the Meiji era, it was said to be a great hell and was feared by people. It is now a tourist destination with many tourists throughout the year. In the rocky areas to the southwest, there are scattered fumaroles called Enmadai, and in the northeast, there is a fumarant zone called Gesawa, which warms the water that has been poured here and sends the water to the area of Gora and Sengoku. Both are off-limits, but the Owakudani Nature Research Road leads around Enmadai. From the car window of the Hakone Ropeway, you can see the sight of the plume, the scene of the inferno.