Designed with cats in mind

Black cat (Margot) climbing up a carpeted section of wall after a laser pointer
Gray cat (Louie) loafing on a metal cat tree with wood accents.
Tuxedo cat, (Mel) on the left, sitting on the shelf above the stair way with her sister, Margot (black cat) headed towards her from hexagonal shelves.
Louie (Gray cat) sitting on cabinet-mounted shelf, transitioning from living room to top of kitchen cabinets.
On the left, there are angled, wall mounted scratching posts that lead up to the above-the-doorway walkway. Mel, tuxedo cat, is on the right, on top of a gray floor to ceiling, carpeted cat tree.
Margot, black cat, is sitting inside of a cube shelf, listening to her brother, Louie (gray cat) on top of the cube shelf attacking the carpeted wall.