Inside Alexandra’s mansion, there is an integrated pool, which also has a connection to the larger outside portion of the pool where one can seamlessly swim / dive from one part to the other, without having to leave the water. The outside section is almost the size of an Olympic swimming pool.
On the indoor side of the pool, there’s the pool maintenance station built into the floor. The valve and opening are integrated into the floor very smoothly, appearing almost invisible and only activating on Lumina’s command.