Home builder Peter Cohen remodeled his California home and turned it into 150 feet of catwalks, tunnels, and stairways, all for his 18 indoor only rescue cats. The house is called House of Nekko (which means "cat" in Japanese) and peter began his vision when he bought The Cat's House by Bob Walker, which is full of photos of the famous cat-friendly house in San Diego. This is one fun house you've got to see to believe..