35 is always nice, at least the northern part is.
The really nice roads are way up north though, nothing really drivable from Quebec. 17 is great along the north shores of Lake Superior, the Highway 11 causeway outside of International Falls, etc.
There are other neat things scattered around the province too, a personal favourite has always been this:
https://www.google.ca/maps/@44.5648318,-78.9514926,735m/data=!3m1!1e3
It doesn't have streetview unfortunately, but its essentially a road through a lake. It often floods in the spring and has to be closed, it is so close to lake level. Just off of the now downloaded Highway 48 too, so its not too remote.
I always liked the Big Chute boat railway too: (there are actually 2 right beside each other, the one pictured is the new one used today but there is an older, smaller one a couple hundred feet over)
https://www.google.ca/maps/@44.8844434,-79.6739623,626m/data=!3m1!1e3
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