Takyung Valley is a product of geothermal activity, reminding everyone that this volcano has not yet stopped vegetables... The overall gas effect is similar to the Denbé Hell Valley, and the air is filled with the common hydrogen sulfide taste in the volcanic area. The famous hot spring boiled eggs, the egg shell will be boiled black, and there is no change in the interior. The tour is generally through the famous Hakone mountaineering railway up the mountain, change the cable car, in the air overlooking the smokey old mountain pass, Oyonggu Station after a few minutes walk to visit up close (note that the gas is irritating).