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.
I saw this amazing building on Facebook. I thought is was fake but according to blogger Christi M. it is real! I think I would be afraid to swim in the balcony overhang pool. Click to check out a Youtube video of the project.