The name “the Underground City” refers to the vast network of pedestrian walkways below the city. There are 33 kilometres of connecting passageways beneath downtown, with the métro (subway), commuter trains and buses also converging here. The passageways serve a more leisurely purpose as it provides access to 40 entertainment venues and attractions. The concept began in 1962 with the lower level shopping mall in Place Ville Marie. With the coming of Expo 67, Montréal’s dream of a métro finally became reality. The underground went through many stages of development. One of the more spectacular periods was the raising of Christ Church Cathedral on piles, in order to lay the foundations for a shopping centre underneath.