I never had a tree house as a kid and although I can't say I ever really felt deprived I wouldn't mind using that fact as an excuse to indulge myself in adulthood! These tree houses by Baumraum out of Germany are absolutely gorgeous, not to mention much larger and more luxurious than what the average 10 year old gets. They build custom tree houses all over the world, although mostly in Europe, and the designs vary from houses built up just a few feet off the ground to designs like this one way up in the tree tops (wonderful to look at but is it really secure balancing up there like that???).
Gallery: Baumraum Treehouses