“We found tons, probably thousands of coins,” former Yellowstone ranger Jeff Henry told Wyoming news outlet Cowboy State Daily. “The main park road used to go right by Morning Glory, so that would account for some of the metal parts that looked like car parts chucked into the bottom of the pool.”

Glory Pool, a hot spring that quietly bubbles in Yellowstone National Park, is famous for its dazzling display of colors, starting with blue and green in its center, before bleeding into yellows and reddish oranges at its edge.

The once-strikingly blue pool has transitioned to yellow-green due to coins, trash, and rocks thrown by tourists over the years

Shutterstock Photo While tourists bring a lot of funds to Yellowstone Park, they also bring a lot of damage. Carelessness and ignorance can often have long-lasting negative effects on the planet, and that appears to be the case here.