https://live.staticflickr.com/65535/52833724908_6db40b9e7a_b.jpg

https://live.staticflickr.com/65535/52833680320_6e01055f89_b.jpg

And you can clearly see the door on the right in the false wall to access the tubes and other stuff they hid in that space back there!

I see built-in setups like this at estate sales sometimes. Unfortunately they are often considered "part of the house" and not for sale, though I'm sure most are trashed once the house is sold.