Two words: Snow monkeys!
In a mountainous area, pretty much smack dab in the middle of Japan, is the Jigokudani Monkey Park.
The translation is something like “Hell’s Valley” because it looks like what you might expect hell to look like — steep, craggly cliffs, with a hot spring bubbling up in the middle. Though, unlike hell might be, snow covers the ground here for a third of the year.
The Japanese Macaque love to bathe in the water and tourists love to come and watch them. Japanican offers Snow Monkey Tours —either for one day or two days with an overnight stay in Nagano. (You might recall the snow monkeys stole the show at the 1998 Winter Olympics in Nagano.)
Consider yourself warned, though: The monkeys are super smart and aggressive. A colleague recalls a friend getting “mugged by a monkey” — the little critters sought out the food in his backpack and then abandoned the backpack and nonedibles.