Here is a 2-in-1 cat tree that can be mounted to a door or used on its own to provide your pets a place to play and relax. The Penn Plax Cat Walk Jungle Gym can be used as a regular shelving unit when free-standing. It gives your place 3 vantage points to keep an eye on everything.
This Jungle Gym has a beautiful espresso finish. It measures 27.5″ x 20″ x 46.75″. It has 3 shelves, each carpeted to offer great traction.