Montreal. It's pretty much farm country from the border north to the outskirts of Montreal. The largest town of size you come to first is St Jean-Sur-Richileu/Iberville. I've never really explored St. Jean, instead keep forging on to Montreal.
You may want to post this question on the Quebec forum. You might get some more/different responses!Edited: 23 June 2018, 22:06
Once you cross the border on I-89, you are in Quebec's farm country - flat and rural. The most interesting thing in this area is the wine route. There are about 2 dozen wineries just over the border. The closest is Domaine du Ridge in St Armond - a very pretty spot. This area, which is considered the Brome-Missisaquoi region of the Eastern Townships is also a very popular bicycling destination with many miles of paved and flat bike trails. As for towns - Bedford is a sleepy little town with a few restaurants, Dunham is the center of the winery district with some fun restaurants. Cowansville is a busy little city that's fun to walk around. For bigger cities, there's St Jean Sur Richeleiu which has a nice downtown and lots of shopping malls and such. Of course Montreal, one of the world's great cities, is just 90 minutes from Burlington.