![A Japanese Macaque soaks in a hot spring at a snow-covered valley in Yamanouchi town A Japanese Macaque - or Snow Monkey - soaks in a hot spring at a snow-covered valley in Yamanouchi town, central Japan, Jan. 20, 2014.](https://api.time.com/wp-content/uploads/2014/01/japanese-macaque-snow-monkeys-spa-day-0.jpg?quality=85&w=2400)
By TIME Photo
![A Japanese Macaque soaks in a hot spring at a snow-covered valley in Yamanouchi town A Japanese Macaque - or Snow Monkey - soaks in a hot spring at a snow-covered valley in Yamanouchi town, central Japan, Jan. 20, 2014.](https://api.time.com/wp-content/uploads/2014/01/japanese-macaque-snow-monkeys-spa-day-0.jpg?quality=75&w=2400)
![Japanese Macaques groom each other in a hot spring at a snow-covered valley in Yamanouchi town Japanese Macaques - or Snow Monkeys - groom each other in a hot spring at a snow-covered valley in Yamanouchi town, central Japan, Jan. 20, 2014.](https://api.time.com/wp-content/uploads/2014/01/japanese-macaque-snow-monkeys-spa-day-1.jpg?quality=75&w=2400)
![Japanese Macaques groom each other in a hot spring at a snow-covered valley in Yamanouchi town Japanese Macaques - or Snow Monkeys - groom each other in a hot spring at a snow-covered valley in Yamanouchi town, central Japan, Jan. 20, 2014.](https://api.time.com/wp-content/uploads/2014/01/japanese-macaque-snow-monkeys-spa-day-2.jpg?quality=75&w=2400)
![TOPSHOTS-JAPAN-LIFESTYLE-ANIMAL Japanese macaque monkeys, known as "snow monkeys," take an open-air hot spring bath as snowflakes fall at the Jigokudani Monkey Park in the town of Yamanouchi, Nagano prefecture on Jan. 19, 2014.](https://api.time.com/wp-content/uploads/2014/01/japanese-macaque-snow-monkeys-spa-day-6.jpg?quality=75&w=2400)
![Japanese Macaque Monkeys Relax In Hot Springs Japanese Macaque monkeys groom each other and relax in a hot spring at the Jigokudani, or Hell's Valley Monkey Park on Jan. 8, 2014 in Yamanouchi, Nagano, Japan.](https://api.time.com/wp-content/uploads/2014/01/japanese-macaque-snow-monkeys-spa-day-3.jpg?quality=75&w=2400)
![JAPAN-LIFESTYLE-ANIMAL A Japanese macaque monkey, known as a "snow monkey," takes an open-air hot spring bath while snowflakes fall at the Jigokudani Monkey Park in the town of Yamanouchi, Nagano prefecture on Jan. 19, 2014.](https://api.time.com/wp-content/uploads/2014/01/japanese-macaque-snow-monkeys-spa-day-4.jpg?quality=75&w=2400)
![TOPSHOTS-JAPAN-LIFESTYLE-ANIMAL Japanese macaque monkeys, known as "snow monkeys," take an open-air hot spring bath at the Jigokudani Monkey Park in the town of Yamanouchi, Nagano prefecture on Jan. 19, 2014.](https://api.time.com/wp-content/uploads/2014/01/japanese-macaque-snow-monkeys-spa-day-5.jpg?quality=75&w=2400)
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