Oyasu Gorge

Named as one of Japan's "hells" (jigoku) for its stark-white volcanic rocks and sulfide gases seeping from vents in the rocks, it was a place of ascetic worship long ago. Sanzensoji Temple was built here to worship, and like many places of ancient mountain worship, women were forbidden. Later it became a sulfur mine. Today there are walkways that allow visitors to explore the hell safely. The main walkway leads to the Jizo statue and Oyutaki Waterfall.

This natural outdoor hot spring is a short walk from the road parking lot and Jizo Statue below Kawarage Jigoku. Bring a swimsuit.

This hotel and onsen has a wonderful view of Mt. Chokai.

A castle ruled by the Onodera Clan until the area was overtaken by the Mogami Clan. The castle has exhibits about the local history and culture.Unique among Japanese castles, you can ride a slopecar to reach the castle. Alternatively there is a walking path.

This onsen, which is particularly pretty in the autumn, is located near a beautiful gorge and a man-made waterfall. There are indoor and outdoor baths for each gender, and a mixed bath (混浴, konyoku) near the gorge and waterfall.

This fascinating museum is essentially a collection of historical objects. There are few explanations of what you're seeing, but most of it is rather obvious -- old records, comic books, toys, TVs, pachinko machines, etc. The museum building is an old house, and the owner often serves tea and snacks at no extra charge. There is bath in the basement, right next to the river, which also may be used at no extra charge.