The tradition of throwing things into the pool dates back to 1872, when the park first opened, according to Yellowstone National Park historian Alica Murphy. She claimed that tourists have always been known for throwing objects into the pool, hoping for either good luck or to prompt a geothermic event.

Glory Pool — perched near the famous “Old Faithful” geyser — was for years a must-see attraction in the Upper Geyser Basin in Yellowstone National Park, according to Cowboy State

Once a brilliant blue, the famous pool's color has changed after decades of damage by the national park's visitors.