Discrete glassy and corrugated textures enhance the entrance to the International Monetary Fund headquarters in Washington, D.C., where delicate laminar water arcs punctuate the space and capture the interest of visitors and pedestrians. But the arcs refuse to be confined, and a few of them have strayed onto the sidewalk and into the building's lobby, creating an inventive transition between outdoors and in. An adjoining outdoor water wall produces a hypnotic moiré effect, where geometric patterns emerge as water flows over its ridged surface. At night, the lamps below reflect off the wall, suggesting a metallic surface, though the wall is stone. The impact of both features is one of ingenuity and precision.