LEARNING ABOUT A CITY through Zillow warps your sense of the landscape. Filtered searches dissolve the edges of neighborhoods and flatten monuments. When my partner and I visited Cleveland this past May, after endless hours of browsing real-estate listings, neither of us took notice of Terminal Tower, once the tallest building in North America outside New York, or knew where to locate the Guardians of Traffic, the stirring Art Deco colossi that stand watch over the Cuyahoga River. We did, however, immediately recognize Church + State, the boxy, checkerboard-colored development that anchors the