The London Underground secured a place in the pantheon of good graphic design with engineer Harry Beck’s topologic Tube Map from 1933. In addition to that icon, however, the transit system has a pretty substantial history of bringing top-notch visuals to the subterranean masses; posters promoting everything from the Underground’s pleasant temperature control—cooler on hot days and warmer when it’s foggy!—to motor shows to the Regent’s Park Zoo have adorned station walls (and delighted passengers) for decades.