The appeal of tree houses is primeval – it’s in our genes to climb branches and perch ourselves high above the ground. They simply have a power that other buildings don’t. “It’s that idea of getting away, escaping from the real world … to a place where maybe adults think of childhood dreams,” says Philip Jodidio, author of the new book Tree Houses: Fairy Tale Castles in the Air. The gorgeous book features 50 tree houses from around the world, including three in Canada. Some are modernist visions, some mimic nature, others test the boundaries of what we would even think of as tree houses