City in Ōita Prefecture famous for its hot springs, boasting one of the highest outputs of thermal water in the world. Visitors can enjoy public baths, sand baths, and scenic “hells” (jigoku) where boiling water and steam rise from the ground.

Price: Free to enter the city; hot spring baths around ¥300–¥2,000 depending on the facility
Touristy?: Yes, one of Japan’s most famous onsen destinations