Giant cement arrows served as guides for pilots in the early days of airmail. That said, they're a lot more interesting now ...

In the 1920s, the U.S. Post Office began experimenting with cross-country delivery of mail by air. Before the advent of radio guidance, mail pilots picked their way along from visible landmark to ...

When United States Post Office planes took to the skies in the 1920s, they had their own version of the roadway’s yellow line. A series of giant concrete arrows and gaslight beacons helped point the ...

Early airmail pilots used a nationwide network of concrete arrows and beacons as essential navigational tools to traverse the country safely.

Every so often, usually in the vast deserts of the American Southwest, a hiker or a backpacker will run across something puzzling: a ginormous concrete arrow, as much as seventy feet in length, just ...

If you’re wandering the barren landscape of Utah or Nevada and stumble across a massive, firmly-grounded concrete arrow, rest assured, aliens have not been marking a path through the United States.

Long before GPS and modern navigation systems, pilots crossing America depended on a network of giant concrete arrows. Built during the early days of aviation, the markers helped guide aircraft across ...

There is no harbinger in America, a huge arrow lies on the ground, and there are things that are connected to the earth in some places rather than in one place. It is clearly hard to see as a traffic ...

WALNUT CREEK — It was 1944, and Carol Eisenman Clark clearly remembers the beam from the Acalanes Ridge beacon a mile or so away lighting up her bedroom below. It was a reassuring presence for a ...

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WALNUT CREEK — It was 1944, and Carol Eisenman Clark clearly remembers the beam from the Acalanes Ridge beacon a mile or so away lighting up her bedroom below. It was a reassuring presence for a ...