At the end of the 19th century, central London was surrounded by steam trains that ran under its streets and gradually added new stations. That was indeed the case of Piccadilly, whose line, inaugurated in 1906 and the second one by track length and number of stops, crosses the city from North to West. But this line’s claim to fame goes beyond that. It also includes the shortest trip of the entire underground network: the 284 yards and 20 seconds it takes to cover the stretch between Leicester Square and Covent Garden and which, despite the hefty four-pound ticket, is the most popular among London visitors.