Treehouses are pretty much the aspiration of every kid, and no wonder; there's something about them that makes them feel like a magic, private clubhouse. Many kids who grew up around trees had at least a few planks up in a tree somewhere to call their own, but what about the advanced players? These treehouses from around the world might just blow your mind -- and inspire you to call a contractor to see about getting one of your own.
Treehouse at the Alnwick Garden, UK. Yes, this is really a treehouse; it's supported almost entirely by the actual trees, with some assistance from piers. The sprawling structure is open to visitors to the garden, which is a lovely site filled with lots of other amazing attractions.