A classic Beppu sightseeing experience is the "Beppu Hell Tour," which takes you to seven unique hells. The sight of steam, hot mud, and boiling water erupting from deep underground is truly hellish. The temperature is around 98 degrees Celsius, so you can't get in. And it seems that Kamado Hell is considered to be the place where the original concept of "Demon Slayer" was conceived. Demon straps Demon towels Unused, but please refrain from purchasing if you are a nervous person.