Iya-onsen, Tokushima-ken (粗谷温泉 徳島) Arrived here by riding 233 kms over mountains, through valleys and killer head-winds with several triathlon friends. . .beacoup beer, laughs and great local mountain ciusine
Hope Springs, Desert Hot Springs by etselecsg, via Flickr. The 3 pools are hot spring fed and vary from very hot to comfortably hot to tepid. It's a wonderful place... only 15 minutes from Palm Springs.
Shirahone Onsen 'White Bone' Onsen (hot spring), named for the milky blue white minerals that make this water opaque. Wouldn't this be a delightful place to soak before bed? All that would be required is a trip to Japan.