I don't have cats anymore because my husband does not like cats particularly; so I just have my little dogs, which he tolerates just fine.
When I did have cats, they used to love to get in any kind of container, boxes, barrels, and even papper sacks, back in the days when groceries actually were packed in paper sacks.
My little Yorkie-poo, Chipper, seems to like little hideaways, too. Since he is eleven years old now, and our other dog, Tootsie, likes to bounce around; Chipper often slips around behind the couch and hides there. He likes to be close to me, and when he is not behind the couch, her is usually laying on his blanket right beside me. The place where he hides in back of the couch is actually right behind me; so he can be secreted away and still feel like he is close to me.