Visit Zao Onsen in the winter to first partake in its top-notch ski and snowboard facilites, then take your cold bag of bones for a rejuvenating soak in the sulfur-rich waters of one of its three indoor or open-air baths. If you can’t make it until the warmer months, don’t worry–those who visit Zao outside of winter can enjoy a ravine-fed outdoor bath that shuts down during the mountain region’s coldest months.
The only downside to Japanese onsen towns? How difficult it is to choose which one to go to next. Fortunately, you’ll be reaping the benefits exclusive to an all-natural hot tub no matter where you end up.