Which onsen villages in Japan are the best to visit for foreign tourists? And what should I do once I'm in an onsen village?

There are many great onsen villages in Japan in which tourists of any nationals can enjoy the experience of bathing in natural hot springs. Some great examples are Hakone, Kusatsu and Nyuto Onsen. Ideally, you would want to spend a day or two in a village as these villages are often located in beautiful nature and offer great opportunities for hiking and walking.