 Built using locally quarried Valser quartzite slabs, the spa building is made up of 15 different table-like units, 5 metres in height, with cantilevered concrete roof units supported by tie-beams.These units fit together like a giant jigsaw puzzle.The nature of the construction is revealed through close inspection of the roof – the roofs of the units don't join, with the 8 cm gaps covered by glass to prevent water ingress.