Much of the infrastructure built for the Fair remains. The city's underground public transportation system, the Metro, opened a year before the Expo, and the dirt that was excavated was used to create the artificial island Île Notre-Dame, which is where the Formula One racetrack and casino (formerly the French Pavilion) are located.
There's also Habitat 67, a gravity defying housing development originally conceptualized using Lego pieces (and it shows), and the Biosphere, a geodesic dome that was originally the American Pavilion.
Another international Pavilion that survived the test of time? Jamaica's -- it's used for private events now.
11. The roads are in bad shape
Blame the weather, the materials used or government ineptitude, but Quebec roads don't seem to hold up as well as those of their American or Ontarian neighbors.
In addition to mammoth potholes and cracks, road surface markings seem to fade quickly. Road conditions are especially bad during spring, when the snow melts and temperatures rise.
And that's to say nothing of Montreal's crumbling interchanges and overpasses, which probably look worse than they really are.
Be prepared to be redirected a fair bit during the summer, because that's when most construction work is done.