Bridegroom’s Oak: The Tree With Its Own Postal Address

Bräutigamseiche,
Dodauer Forst,
23701 Eutin, Germany

Semaphore: The World’s First Telegraph

A Chappe semaphore tower near Saverne, France. Photo credit: Hans-Peter Scholz/Wikimedia

Smoke signals and beacons have been used to relay messages over short distances since ancient times, but the only reliable way to send messages over long distances