Atlas Obscura
Dugway Aviation Navigation Arrow in Skull Valley, Utah
The first important commercial application of air travel was mail delivery. In an era when physical paper records were critical in business and government, the swift delivery of important messages, or contracts, or whatever was worth a substantial premium. However, the aircraft of the time were primitive, particularly in their navigation. With no radio, much less any radar or GPS, all navigatio…
Concrete arrow, 70-100 feet long, part of a 1920s airmail beacon network.