We spotted this space over at the blog Dude Craft. It's from the French site Living With You. This space is special, not just because it's different, but because it's inviting for people of all ages. Granted, without giant safety rails, it's probably best shared by parents and children alike until they're old enough to be trusted not to jump off.
Many backyard kids spaces are usually just that, kids spaces. The idea of crawling up a tree or through small doors into club houses isn't always appealing, but this looks like a great space to teach your children about the cosmos or possibly make out with your husband or wife once the kids have gone to bed!