Jigokudani Monkey Park in Nagano.

The Jigokudani Monkey Park, also known as the Snow Monkey Park, is a public park located in the Jigokudani valley of Yamanouchi, near Nagoya tourist attractions. It is famous for the troops of Japanese snow monkeys that reside in the area. These monkeys are often seen soaking in the natural onsens, which is a sight that attracts tourists from all over the world to visit in large numbers. The best time to visit is during the winter season when the valley is covered in snow and the monkeys descend to the onsens to escape the cold.