Americas Insane Network of Abandoned Aerial Highways
From Calum. Calum15 to get 15% off your Holzkern order! 👉 https://www.world.holzkern.com/en_world/calum All across America, thousands of unusual concrete arrows are hidden high upon hills, in deep woodlands and arid deserts. They are the last remains of a vast network that once guides planes across America in the early days of aviation. I went looking…