The Morning 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 ...

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.

No, this isn't some St. Patrick's Day joke. Researchers say that Yellowstone National Park's world-famous Morning Glory thermal pool is turning a yellowish-green by decades of tourists throwing ...

Morning Glory Pool, located in the Upper Geyser Basin near Old Faithful in Yellowstone National Park, used to appear as the dazzling crystal-clear blue color that inspired its name.

Morning Glory Pool is a thermal pool in the Upper Geyser Basin near Old Faithful. It got its unique name in the 1880's for its remarkable likeness to its namesake flower. But years of vandalism ...

Yellowstone National Park’s famous geothermal pool named Morning Glory has reportedly changed color due to the volume of debris thrown in by visitors. According to park historians and former ...

This photograph of Morning Glory Pool in Yellowstone taken in 2013 shows the pool after it lost the deep blue color that prompted its name.

Before the 1960s, Yellowstone’s Morning Glory pool was a deep, sometimes tropical-looking blue. It was named after the flower that its color resembled. If you had visited Yellowstone in the ...

Historically, Morning Glory Pool dazzled early park visitors with its crystal-clear blue waters. Named after the vibrant Morning Glory flower, it was a key attraction in Yellowstone's early days ...

With a little mathematics and some scientific wizardry, Joseph Shaw and two of his colleagues have put the glory back in Yellowstone National Park’s Morning Glory Pool. “What we did is ...