**Jigokudani Onsen Korakukan** is a historic hot spring inn located deep in the mountains of Nagano, right next to the famous Jigokudani Monkey Park. Opened in 1864, this rustic ryokan offers a truly unique experience—guests can bathe in traditional indoor and outdoor onsen while wild snow monkeys occasionally appear nearby. During winter, it's common to see the monkeys soaking in the same geothermal waters just steps away. The inn features tatami-matted rooms, local cuisine, and a peaceful, remote atmosphere. Day visitors can also enjoy the hot springs for a fee of **¥1,500**, with towel rentals available for **¥400**. While simple in amenities, its charm lies in the rare opportunity to share a natural space with Japan’s iconic macaques. Whether staying overnight or visiting just for the onsen, Jigokudani Onsen Korakukan offers one of the most unforgettable, wildlife-rich hot spring experiences in Japan.

**Zenkoji Temple** in Nagano is one of Japan’s oldest and most important Buddhist temples, founded in the 7th century. It houses the first Buddhist statue ever brought to Japan, a hidden image (hibutsu) that is never shown to the public. What makes Zenkoji truly special is its open and inclusive tradition—it welcomes people of all faiths and backgrounds, regardless of gender or belief. One of the temple’s most unique features is the **Okaidan Meguri**, a pitch-dark underground passage beneath the main hall where visitors search for a metal key said to grant enlightenment. The spiritual atmosphere, historical depth, and beautifully preserved architecture make it a must-visit in Nagano. Entry to the outer temple grounds is free, while admission to the inner chamber, passage, and museum is **¥600** for adults. Whether you're seeking history, culture, or quiet reflection, Zenkoji offers a powerful and memorable cultural experience in the heart of the city.