Cat Solarium is the ultimate cat window box or catio. You dont have to have a big back yard to give your cat a taste of the outdoors. With the Cat Solarum you can let your indoor cats outside safely. Cat Solarium, the stylish, open-air feline sunroom with the panoramic view. A true solarium just for cats. Check out our customers in their Solariums: Gallary Catio, Cat Patio, Cat Solarium, Cat Window Box.