Until 1970, they were unaware of the existence of any people on Earth besides themselves. Hard to believe with such extensive views from their 140 foot high tree dwellings, but when you’re living in one of the least explored jungles in the world, these things can happen. The indigenous Korowai tribe have been building their towering tree houses probably long before we ever had sky scrapers, on the isolated island of New Guinea, part of Papua in the Indonesian Rainforest.