Hot air balloon over Auburn, Washington, USA

© Taliesin Black-Brown and Ben Cowan/Nimia

Hot air balloon over Auburn, Washington, USA

Really, there’s only one way to celebrate Hot Air Balloon Day properly. But if you can’t catch a ride in a basket under a giant balloon today, know that the idea dates back at least to 3rd-century China, where paper lanterns were used as military signals. Fast forward to 18th-century France, where two paper-making brothers, the Montgolfiers, launched unmanned hot air balloons. Then, to great fanfare, they tried sending up a sheep, duck and rooster, and finally, Etienne Montgolfier took a ride himself. Designs have improved since then, resulting in the standard hot air balloon seen here.