Inside the pavilion is a single 200m (985 ft) long space, shaped by the berms and enclosed by curtain walls and a long span, concrete roof, punctuated by skylights. The berms, clad with plants and flowers on the south faces and stone and wood on the north faces, exist somewhere between the natural and the man-made. They seem to represent natural geological conditions, such that water moving through the building formed the walls of the space. Moving along the wood bridge, one looks down at the water basin, saturated with vegetation, which furthers this representation. Biosphere and Flower Pavilion.Potsdam, Germany