Nagano Prefecture offers many of Japan's natural, historical and cultural treasures. Close to Nagano City, the temple town and capital of the prefecture, are the famous "onsen monkeys" of Jigokudani, and while there are many natural hot springs and tourist traps, there are also many intriguing sites such as the WWII Imperial Headquarters Tunnels in historic Matsushiro that few visitors to Japan know about or have the chance to explore.