Cat shelves or cat walls? No matter what you call them they are the coolest diy cat idea I've ever seen. Cat climbing shelves are a great way to make something cool for you cats & save space in your home.
The Climbing Pole: "This is a tall climbing post fashioned from a wrapped in cotton clothesline rope. It stands away from the wall with spacers so the cats can get their paws around the post for better climbing.