Intrepid Cities: Skylines (opens in new tab) player inthoughtwelive (opens in new tab) has recreated downtown Seattle using 49,152 buildings, at which point the building limit put an end to his architectural dreams. I haven't been to Seattle—this could be a replica Mombasa for all I know—but Google Maps seems to corroborate things (opens in new tab).
Starting with a template by Tanis_2589, inthoughtwelive "redid all the highways, and then eyeballed the rest using Google Earth as a reference". Traffic lights had to be forcibly disabled so as to avoid a traffic jam of apocalyptic proportions.
Seattle residents can attempt to spot their house in (opens in new tab).