Khonoma Village is about 20KM from Kohima, Nagaland's capital. Set on a hill amongst rice paddies, mountains, and mystical fog - it makes you wonder if you're still in India. The village is estimated to be around 700 years old, which you can still see the village gates and fort.
The village was the first one to declare no more hunting of animals and create strict rules around nature conservation (they even have trash cans!) They are eager to share their culture, talking to us for a while about the history of the village, the dispute between the Naga tribe and the Indian and British governments, and the truth about the Naga headhunting warriors. They have a Council of Elders who make decisions and settle arguments, peacefully.
You can do a homestay with them. However if you don't have enough time, I would definitely spend the day there - reserving some time for the drive as the unpaved roads can be muddy and slippery.