The hell area of kannawa and kamegawa has been called "hell" since more than 1,000 years ago because fumaroles, hot mud, hot water and so on were spewed out and it was impossible to get close. The cobalt blue sea jigoku, the red hot mud blood pond jigoku, the dragon roll jigoku and the pale white white pond jigoku were designated as national scenic beauty in 2009. There are also places where you can easily enjoy such as a steamed sand foot bath and a foot bath that even wheelchair users can enter. There are also recommended souvenirs such as hell steamed pudding and hell ointment. You can also taste and compare the famous "onsen tamago" at each hell.