Saturday, September 7, 2013

Giant Concrete Arrows That Point Your Way Across America

Via Tom

Cement Arrows, Transcontinental Air Mail Route

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 sitting in the middle of scrub-covered nowhere. What are these giant arrows? Some kind of surveying mark? Landing beacons for flying saucers? Earth’s turn signals? No, it's…

The Transcontinental Air Mail Route

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