The way the article was written, it sounds like the staircase leads to the top of a garden wall that he likes to walk along. I'm assuming there's probably a decline somewhere along the way to let him down the other side. What a nice thing to do for a cat who's no longer able to get around like he used to. Mine though, they're indoor cats, and have been since day one.. I can't think of any way to make sleeping and being lazy easier on them as they age lol.