Vertical space is particularly important, as many cats enjoy climbing. "Access to sun and shade, as well as a good view of birds or other wildlife, can also make the space more enjoyable for your cat.

Prior's catio features wooden perches, ramps and a tall climbing post with an area for the animals to take a cat nap. It cost around $1,000 to build.

Give your indoor cat safe outdoor adventure with a catio! Learn how these enclosures boost health, happiness, and ...