The Geyser Museum and Foot Onsen are located along the shore of lake Suwa. You can relax with your feet bathing in the hot thermal water wile enjoying the views offered by the lake. A release of hot thermal water (geyser) is scheduled every hour at the museum.
Nozawa Onsen is a small village located in Nagano prefecture. It is a very popular onsen and ski resort. There are about twenty public onsen (hot bath) in the village and they are free to use. Each has different temperature and chemical properties. You can get a stamp book and collect stamps from every onsen, each has a unique illustration. I was told that at one of those Onsen the water temperature is close to the boiling temperature of water (the water is at 95C)! If you do not fear warm water, a trip to Nozawa Onsen is a relaxing and enjoyable experience!