I recently spent some time trying to figure out the furthest north you can drive in Canada by car (or at least without a float plane), and what there is to do up there. It's actually pretty interesting. Apparently you can get up to James Bay via the James Bay Road and the Trans Taiga Highway, but there isn't any way to actually get up to Hudson Bay without a boat or a float plane. It's crazy how much of the country is basically unexplored. Apparently over 90% of the lakes don't even have names, so you can name a lake if you want to be the first person to visit it.