Dupont Underground is an abandoned trolley station underneath Dupont Circle that recently had a design competition to reuse a whole lot of plastic balls from National Building Museum’s The Beach. The winning entry was Raise/Raze, which formed the balls into 3 x 3 cubes that were used to build columns and walls in a portion of Dupont Underground. The structures built by the balls were rather interesting, especially when considering they were built with spheres. I also rather liked the way the cube blocks mimicked the tiles on the outer wall of the underground.