Kiyotsu Valley is one of 3 major Valleis in Japan. It is about 12.5km long valley made from lava flow. It is one of the very popular Autumn leave spots in Niigata.
There is a tunnel that go into the rocks so that people can watch hard cliff of the valley. This tunnel has 4 observatories.
Each seasons has different sceneries. Especially, snow season is breath taking.