Montréal: Be sure to explore the Underground City

Note that the network of tunnels, shops, and subway lines beneath the city’s surface is so large that you’ll want to use the Metro to save time and energy. Daily and weekly rider passes are available. Remember: it’s easy to get lost. There are no landmarks and routes are seldom direct, so keep your eyes on the signs (a Métro map helps). And if you start to feel panicky, come up for air.