Jigokudani Yaen-koen in Shimotakai-gun, Japan by Takahiro Yoshida / SOPA Images
Jigokudani Yaen-koen was opened in 1964 and it’s known to be the only place in the world where monkeys bathe in hot springs. The Jigokudani Yaen-koen (altitude 850 meters) is located in the Valley of Yokoyu River sourced from Shiga-Kogen of the Joshinetsu-Kogen National Park in northern part of Nagano prefecture.
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