Let’s look at three specific builds where the hidden zone toilet is the star.

On her last visit, Marta carried the heaviest found thing she'd ever seen: a small, dense bundle that hummed with the weight of a child's entire childhood. It had slipped out of a woman’s pocket decades ago and had been folded into the Zone like a secret no one dared say aloud. The bundle clung to Marta like cold stone.

The term "hidden zone" refers to a design philosophy that differentiates between the (the aesthetic parts of the room) and the hidden zone (the technical components that are tucked away after installation).