Question One: Point North.
Contrary to sign above, Detroit, Michigan lies directly north of Windsor, Ontario.
So if you are near the Detroit River, you simply scan the horizon for the Renaissance Center, or as some of the locals call it, the RenCen.
In England all you need to do is look at a church. Old English churches are always aligned along an East-West axis with the tower in the west. It is very rare to see an exception to this.
If you look at the church yard surrounding the church you will often see the ground level is lower on the north side. The cold north side is less popular for burials and successive centuries of interments have raised the ground level on the other three sides.