An Arizona Diamondbacks fan catches a foul ball during the seventh inning against the Cincinnati Reds at Chase Field on June 14, 2022 in Phoenix, Arizona. (Photo by Norm Hall/Getty Images)
Vietnam’s Son Doong cave, the largest in the world, could hold a 40-story skyscraper inside. The pristine ecosystem has its own river and jungle. Despite its size, Son Doong wasn’t discovered until 1991. It was lost again for nearly two decades and was fully explored for the first time in 2009. (Photo by Jason Speth/HuffPost)