The tradition of throwing things into the pool dates back to 1872, when the park first opened, according to Yellowstone ...

The Morning Glory Pool — perched near the famous “Old Faithful” geyser — was for years a must-see attraction in the Upper ...

Decades of trash and debris have forever changed the spectacular blue color the pool was once known for.

In the 1970s, rangers realized the depth of the problem at the Morning Glory Pool and decided to clean it out. They partially ...

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

Glory Pool has been the victim of decades long ‘vandalism’ causing its deep blue colour to change to a rusty yellow ...

Morning 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 ...

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

The tradition of throwing things into the pool dates back to 1872, when the park first opened, according to Yellowstone ...

The Morning Glory thermal pool, a once-pristine, brilliant blue thermal feature in the park's Upper Geyser Basin has been transformed over the years as visitors have thrown things into its waters.