Sometimes when felines and humans live together things can get, well, catty. Japanese home builders Asahi Kasei
designed and built the Plus-Nyan House with special features that cater to the needs of cats and their owners, including cat walks and tunnels, climbing steps, and sleeping nooks. All materials in the home resist scratching and are easy to clean, and the house encourages cat/human interactions throughout, even in the bathroom, which has a special alcove for a kitty litter box next to the toilet. When tired of the amenities inside, kitties can explore a fenced-in outdoor area on the roof.