The Map Game
I learned this from a couple of teenaged gals with whom I traveled. You start with whatever geographical place you see on a sign. It can be a state, a country, a lake, a mountain, a river, etc. Then everyone has to take turns coming up with a feature that can be found on a map starting with the LAST letter of the named place. As many times as I've traveled in a car,I'd never heard of this game and enjoyed it.
For example: Galena
Answer: Salt Lake City
As you can see, there is no one completely right answer, it just has to be on the map.