The roof of the MCA warehouse (not normally accessible to visitors) offers a sweeping panorama of the city, including some less familiar sights such as a giant disused railroad bridge now serving the sole purpose of holding up a set of traffic lights for oncoming Metra traffic. Seen from here, Chicago’s skyline looks somewhat unreal, like a giant Potemkin village hugging the shores of Lake Michigan. (“Potemkin village: an impressive facade or show designed to hide an undesirable fact or condition. Origin: Grigori Potemkin, who supposedly built impressive fake villages along a route Catherine the Great was to travel. First known use: 1937.”) Take a 180-degree turn toward the West, however, and there is nothingness as far as the eye can see.