A "Catio" is an outdoor enclosure designed specifically for cats, allowing them to enjoy fresh air and sunshine while keeping them safe from potential dangers like predators and traffic. These structures can vary in size and design, ranging from small window boxes to large, elaborate spaces that connect to a home. Catio designs often include features like climbing shelves, scratching posts, and tunnels to keep cats entertained. They can be built using various materials, such as wood and wire mesh, and can be customized to fit the owner's yard or balcony. A Catio provides a secure environment for indoor cats to experience the outdoors.