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 ...

Long before GPS and modern navigation, pilots relied on giant concrete arrows stretching across America. The structures ...

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.

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 ...

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 ...

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 ...