Abstract: A spill-over type spa is disclosed for use with an existing swimming pool. Water enters the spill-over type spa in the usual manner, but is thereafter permitted to spill-over into the adjacent swimming pool via a transition section integrity formed with the spill-over spa. The transition section rests on an upper peripheral edge of the swimming pool, thereby permitting water within the spa to spill-over into the pool. The spa is placed adjacent an existing pool in a manner to preserve integrity of the existing pool wall, yet permit the spa to function with the pool.