At Atami City's Hashiriyu, one of Japan's three oldest hot springs, 170 liters of 70-degree hot springs gush out every minute from a mysterious cave. This spring, which has been flowing for about 1,300 years, was once a place of worship as a sacred hot spring, and its depth will captivate your heart. The inside of the cave is enveloped in heat like a steam サウナ, allowing you to feel the earth's vitality. There is also a footbath where you can spend a luxurious time, but be careful as it can be slippery.
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