This cat shelving leads up to a tunnel to the upstairs. There's wider shelves in two places, one for eating and one for watching the dogs below. : r/mildlyinteresting
California man builds cat paradise, helps fund FIP research – Adventure Cats
DIY Cat Tunnels / Doors / Pass Through / Bypass between rooms – DIYable.com
How to build an outdoor cat tunnel - Cuckoo4Design
Upgraded Cat Tunnel Bone-Type, 4 Way Collapsible Cat Playhouse Pet Play Tunnel Tube with Storage Bag for Cats, Puppy, Rabbits, Ferret, Guinea Pig, Indoor and Outdoor Use : Amazon.co.uk: Pet Supplies
Nobleza Cat Tunnel Toy in Suede, Collapsible Cat Tunnels for Indoor Cats, Cat Play Tube Tunnel with Suspended Ball and Peek Hole Crinkle Sound for Pet Rabbits Kittens, D25*L60cm, Gray : Amazon.co.uk:
Spectacular cat-friendly California house with built-in cat tunnels and walkways | Parque para gato, Casas do gato, Túnel para gatos
Giant cat Play in Tunnels | Posters, Art Prints, Wall Murals | +250 000 motifs
Amazon.com : The Kitty Pass Wall Entry cat Door, Cat Door Tunnel, Cat Wall Door Pet Door Hidden Litter Box.n : Pet Supplies
Man Turns His House Into Indoor Cat Playland and Our Hearts Explode - YouTube