Crystalline structures and colour worlds run throughout the hotel, giving expression to a desire for natural relaxation. The mineral-rich saline is more than just a spatial metaphor, however, if only because the adjacent thermal spa can be reached in a bathrobe and slippers. Bad Rappenau’s graduation house is also within walking distance: a salt extraction facility that enriches the air with salt, and is used as both a recreation area and for respiratory therapies. We translated this context into a design concept in which hard edges blend into soft shapes, supported by colours and materials from nature. In the hotel lobby, fabrics with palpable textures recall the brushwood of the graduation house, whose grey-brown chromaticism and structure reappear in the wallpaper and wall reliefs.