This is what I call a tree house! The Minister's Tree house is located in Crossville, TN exit 320 off of I-40. To see more photos visit Chuck Sutherland's Flickr. Looks pretty awesome for a tree house.
Did you have a tree house when you were little? I always wanted one, but did happen. Although our neighbor's across the street had a little children's house that we LOVED to play it. Even had a built in wooden kitchen and banquette.