It looks downright dangerous … yet its creator claims it is divinely inspired by a vision he received in which he was told to begin building a tree house for which he would never run out of materials. 15 years, 10,000 square feet and 250,000 nails and a lot of scrap wood later, this amazing structure towers up over the very trees that support it. (via 1 Man, 10 Stories, 100 Feet: Tallest Treehouse in the World | Dornob)