....Drive on parkway's and park on driveway's.

Then, of course, people argue that the definition of a parkway is a "landscaped highway, often divided by a planted median strip," which would explain that the "park" in parkway is to be interpreted as "an area of land set aside for public use." I guess it is, but have you ever seen anyone having a picnic in the middle of the highway?
They would also argue that a driveway is defined as "a private road that connects a house, garage, or other building with the street," which I would say it is. SO, that explains the whole thing; but still, having to explain things like that to someone just learning English seems absurd.