This pool is awesome. Hidden pools. The ground moves up and down. Can be the cover for a patio. And have different depths: A wadding pool for children, and paddling pool/spa depth, and big pool/ cannon ball depth. Floor/cover moves in 2 minutes.
A Vacation in My Own Back Yard, Custom in-ground hot tub for super small yard, I wanted to be able to "swim" in the pond, so I decided to change it out for an in-ground spa. The spa has 8 jets and can be heated to 104 degrees F.