People build bird houses, swing sets, tree houses and even skating rinks for their kids. But a Minnesota man has created an indoor fun house just for cats.

Homeowner Greg Krueger loves trails and paths, and he loves his cats. So he decided to link those passions together. He’s been at it for more than fifteen years, carving through his walls to create elaborate passageways. It’s like a puzzle he say’s that he never quite finishes… Do you think this is amazing, or a little bit crazy?

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