The Blur Building is an exhibition pavilion built for Swiss Expo 2002 on Lake Neuchatel in the town of Yverdon-les-Bains. It is an architecture of atmosphere. Its lightweight tensegrity structure measures 300 ft wide by 200 ft deep by 75 ft high. It streches over a total of 80,000 square feet. The primary building material is indigenous to the site, water. Water is pumped from the lake, filtered, and shot as a fine mist through a dense array of high-pressure mist nozzles. The resulting fog mass produced is a dynamic interplay of natural and man-made forces.