Takaragawa Onsen

Four massive mixed-gender rotenburo baths line the banks of the Takara River, making this secluded mountain onsen one of Japan's most spectacular outdoor bathing experiences. The riverside boulders and forested mountainsides create a wild, natural atmosphere unlike typical hot spring resorts, with separate baths available for those preferring privacy. The journey to this remote Gunma valley rewards visitors with some of Japan's largest open-air pools, fed by waters said to benefit skin ailments and promote relaxation.