RÉSO 
Description
The city's underground city, linking Metro stations, shopping centres and a large number of hotels and offices all below the streets - air conditioned in the summer and heated in the winter it's possible to get around a lot of Montreal without actually heading outside. Particularly useful where the long cycles on the traffic lights make getting across the road a slow process.
Charge
Getting There
Latitude: 45.501053; Longitude: -73.569237
What3Words: gripes.circular.stadium
