Cat Castle: the Modular Cat Playground. The Cat Castle is a modular cat playground featuring 2 Cozy Fur Condos that serve as "lookout towers" and cozy shelters, 11 Plush Fur Hammocks for resting, perching and sleeping. Link - via BornRich Comments (1) My cat's so lazy he'd probably sleep under it. Abusive comment hidden. (Show it anyway.) Login to comment. Enable JavaScript and Click here to access all of this post's 1 comments