Visited North Kyushu in late Dec with close relatives. Rented 2 wagons for 10 adults + luggage.
Overall itin – Fukuoka > Beppu > Yufuin > Kurokawa > Karatsu > Fukuoka.
had sumptuous dinner in local restaurant serving fresh yet inexpensive seafood, though sake was the weakest link.
On next morning, picked up rental cars and drove to Beppu. Took about 2 hours via expressway. Beppu has about 8 different onsen sources. In 2000 and 2008, we visited a few of them for daytime onsen and stayed in Kannawa and Kankaiji onsen.
Visited 2 Jigoku (地獄, Hells) out of several of them. The Umi Jigoku (Sea Hell) is of boiling, bluish onsen. OTOH, the Chinoike Jigoku (Blood pond Hell) is of reddish brown. Stayed in an onsen ryokan in Kannawa onsen area with its own source – Oniyama Jigoku, that we last stayed in 2000. The rotenburo is so huge that it’s roughly half of a standard swimming pool.