What are the giant concrete arrows used for?
Correct answer: They guided the air mail pilots in the early 1920s
Anna J
I never knew that; but it was ingenious at the time.
Maustrauser
All very good but this is a global game. Not just American.
Aid
More than 1 country has a Post Office. I doubt that more than 1 country has big concrete arrows made by the post office.
poopy pants
a bit of an American centric question, better so say 'in America, what...'
Glendar
That's really neat! I'm an airplane nut and didn't know this one. Cool, I love this game!