Beppu's top sight is the seven hells (地獄 Jigoku), multicolored volcanic pits of boiling water and mud, and one geyser. The hells are too hot to be diluted into onsen baths, and they emerge at temperatures ranging from 50 to 99.5 °C (122 to 210 °F). Some of the hells have a natural smell of sulfur — which comes out a bit like rotten eggs.
The seven hells are administered by The Beppu Jigoku Association, ☏ +81 977-66-1577. Combination tickets can be purchased at any of the hells for ¥2200 for visits to all eight; if you first purchase an unlimited bus ticket for ¥900 from the Foreign Tourist Office in Beppu train station, you get a coupon book which includes a ¥200 discount for the combination ticket. If purchased separately, admission to each individual hell is ¥450. Hours for the eight hells are 08:00-17:00, although Tatsumaki-Jigoku doesn't close until its geyser has had its last eruption at the end of the day, so it may be open a little bit later than the rest. All seven hells can be seen at a fairly leisurely pace in about 2½ hours.
Two of the hells are next door to each other, and the others are within a few minutes walk. Take bus #2, #5, #9, #41, or #43 from JR Beppu Station to the Umijigoku-mae stop. The foreign tourist office in Beppu train station can tell you the next bus that is leaving for the area, as well as provide a map of the route.
Two more hells are about 2.5 km away. Either catch a bus back to the Kannawa Onsen bus stop or walk a couple minutes down the main road or Miyuki-zaka to Kannawa Onsen street, and take a left. From the Kannawa Onsen stop, take bus #16 (6 min).
The Tatsumaki-Jigoku is a geyser that goes off every 30–40 minutes for a period of about 5 minutes. One trick in using your time efficiently for the final two hells is to first go to the Tatsumaki-Jigoku and find out when the next eruption occurs. If you just missed the last one, then go see the Chinoike-Jigoku first.
