Meili & Peter & Gunther Vogt - Park Hyatt Hotel, Zurich 2008. A series of large, marble blocks sit in a grid like formation that references the building facade. Subtle convex and concave shifts in the surface of each individual piece ensures that the frequent rain-water evaporates in specific ways, creating a constantly changing hue and reflective pattern in the courtyard. An adjacent courtyard accomplishes a similar effect with plantings. Via, photos (C) Georg Aerni.