Jigokudani Monkey Park was established in 1964 and is located in the Yokoyugawa Gorge of the Joshinetsu Plateau National Park, at an altitude of about 850 meters. Due to frequent geothermal activities, steam and boiling water often emerge from cracks in the ground, hence the name "Jigokudani". The Japanese macaques here imitate the behavior of humans taking hot springs, and gradually formed the habit of taking hot springs to keep warm in the cold winter. The park has built a hot spring pool specifically for the monkeys, and feeds them regularly every day to attract the monkeys to stay here for tourists to observe closely. In autumn, the temperature is moderate, and the monkeys are more active. It is common to see monkey mothers taking their babies to forage or play in the mountains and forests. Although most monkeys do not take hot springs, their natural state and social behavior can still be observed up close.
Red leaves: The forests around the park gradually turn red, orange and yellow, creating a rich red leaves scene. The red leaves, along with the valleys, hot spring steam and lively monkeys, are ideal subjects for photography enthusiasts.