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 ...

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 ...

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.

To combat these challenges, postal officials arranged for acetylene gas beacons installed every three miles along airmail routes. These beacons could be seen for up to 10 miles, and were also used to ...

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 ...

Across the United States, giant concrete arrows sit abandoned in deserts, forests, and remote plains. Most people have no idea why they were built. After World War I, pilots flying early air mail ...

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 ...

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 ...

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 ...