Why the US Landscape is Dotted With Giant, Concrete Arrows (Video)

February 21, 2017 8:26 pm Last Updated: February 21, 2017 8:26 pm

The U.S. landscape is filled with myriad objects that are easily visible from the sky, and, while the purpose or source of many is widely known, others are tougher to explain. Take, for example, the giant concrete arrows that dot a number of the nation’s otherwise undeveloped expanses.