Wow. That is some great information. With it being so big I bet they have some amazing architecture there! Is there anything you're able to tell me about that? 
 I do not have detailed information about The Underground City available to me at this time, however I can tell you that the city hosts the Canadian Grand Prix of Formula One, the Montreal International Jazz Festival and the Just for Laughs festival in the same area. Montreal was merged with the 27 surrounding municipalities on the island of Montreal creating a unified city covering the entire island. 
 Montreal is the place to be when you're looking for a fun time, I've learned thanks to you!!! I really appreciate everything you went over with me today!!! 
 Yes, pavilions designed for the 1967 International and Universal Exposition, popularly known as Expo 67, featured a wide range of architectural designs. Architecture and cobbled streets in Old Montreal have been maintained or restored and are frequented by horse-drawn buggies carrying tourist. 
 I have never heard of The Underground City but I would love to know more about it!!
Yes, pavilions designed for the 1967 International and Universal Exposition, popularly known as Expo 67, featured a wide range of architectural designs. Architecture and cobbled streets in Old Montreal have been maintained or restored and are frequented by horse-drawn buggies carrying tourist.