Not Really "always"

I've never wanted one of those rickety,tiny tree houses thrown together over a few weekends in the backyard.What I want is a house in a tree.Nothing fancy,no electricity or heating but still something that you could spend a few nights in or escape to.I actually love the one pictured in the logo,though it does look a little like it might collapse any moment after being eaten away by plant life and insects for years. :P