London's subway system (“the Tube”) is a standout feature of the city. Stretching into the suburbs, it connects a vast and diverse metropolis. Its easy-to-use lines take tourists and locals from monument to monument, pub to pub in fairly clean train cars (when compared to other major global hubs like New York City). Since 1863, the London Underground has been trendsetting in the transportation world as the first subway system. In the 20th century, it innovated intercity transport yet again by releasing a pocket map with a unique new design. This map of the Tube, created by designer Harry Beck, inspired transport maps around the world in the decades to follow. His intriguing archives are now on exhibit and for sale at The Map House in London.