Few structures evoke the nostalgia of childhood like the treehouse.
As a child, one of my best friends had a treehouse, six feet up the oak tree in her yard, complete with a rope swing and a trapdoor. I lived for afternoons there, sipping lemonade and munching on pretzel sticks within the walls of her hidden kingdom. I knew that treehouse to be a pirate ship, a faraway cabin, a spaceship, and a mansion.
