We don't know for sure because, well, they're hidden. But Airbnb does allow for hosts to place cameras in common areas like the kitchen and living room, so chances are, they're in there somewhere. Here's how you can find them.
Rent this Mercer Island getaway from Airbnb and you get your own waterfront, your own private beach, and access to the big a** lake, so BYOB (bring your own boat). More like, bring your own boatload of money!