This is the classy Super Mario themed cat play area built by the folks at Catastrophic Creations (previously: their equally impressive Super Mario chain chomp cat bed). The warp pipes are even functional. So if you ever can't find one of your cats, it's probably in the warp pipe. Or under your bed. Or in the back of a closet. Just open a can of tuna and it will come running. If it doesn't come running, you need to go open some doors because that cat is trapped somewhere and probably freaking out.
Keep going for several more shots of cats living the dream.
Thanks to Brianna, who's holding out for a Mega Man themed cat play area.