Unfold the mystery behind these giant concrete arrows
All across the United States of America, you can find giant concrete arrows. These arrows, each of which are 15 to 21 meters across, all point the same direction. Did you know about these arrows? And if you did, do you know what you’d find if you were to follow them all the way?
They stretch about 18,000 miles, so we’ll save you the effort and tell you just what’s at the end of this massive treasure hunt.