Peter Cohen is a home builder in California who has turned his house into an indoor cat playground for his 15 cats. Over the years he has acquired more rescue cats and built an elaborate system of catwalks, tunnels, platforms, and perches for the cats to enjoy. This is truly a cat lover dream house. The home is designed so well that you never get the sense that you’re living with 15 cats. I still think they need a dog to complete their family.