If you were to be hiking through the deserts of the American Southwest, you might still come across a large concrete arrow that was about seventy feet in length.
I’ll bet that anyone seeing them probably doesn’t know their origin and may have had another theory for their purpose. Maybe they are landing beacons for UFOs.
Not quite as mysterious, but rather interesting, they are the result of our US Postal Service starting to use cross-country air mail before it had a reliable way to communicate with their WWI Army surplus planes. This was only 60 years after the Pony Express had been shut down.
In 1924, they installed a series of concrete arrows with beacons across the country. They were set longitudinally from San Francisco to New York City spaced at about every ten miles. Each concrete arrow was next to a 50-foot tall tower with a rotating gas-powered light that was visible from 10 miles above for pilots to use in navigating.
By the time of World War II, radio communication and radar had improved and the beacons and arrows weren’t needed. The metal towers were taken down for the metal to be used in the war effort.
This Yellow Concrete Road could lead you from ocean to ocean, with possibly a few stops in Oz along the way.
The lights flashed a code to identify each beacon’s number, so perhaps some UFOs actually did see them and decoded our messages.