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 systems, pilots crossing America depended on a network of giant concrete arrows. Built ...

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 ...

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 ...

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 ...

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 ...

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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 ...

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 ...