Canadian Post: Mail isn't delivered on Saturdays. I keep looking for something in our slot on Saturdays. And apparently there's no difference in price between post cards and letters. Not that we send a lot of post cards. But still.
Newspapers: Apparently some are free--not the daily ones, but we get a couple local ones that show up on our doorstep about three times a week.
Washrooms: right up to the border they're called restrooms on the American side, but washrooms on the Canadian side.