The tower maintained its slender proportions along its full height, and as this room was larger in diameter than the previous one, they had to be underground. Circular in plan with a jointless ceiling twenty feet overhead, the room’s white ceramic walls and floor followed the tower’s endless perfection. Alice stepped forward, and her nose wrinkled as the air changed, the elevator’s faint vanilla smell replaced with an undertow of industrial chemicals that reminded her of a car wash—the tang of cleansers and antifreeze.