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 State Daily.

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. However, after ...

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 ...

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 ...

Green may be a celebratory St. Patrick's Day color, but the unwanted appearance of green and yellow colors in Yellowstone National Park's normally electric blue Morning Glory thermal pool are ...

One of Yellowstone National Park's most iconic attractions has been permanently changed by tourists. The Morning Glory thermal pool, a once-pristine, brilliant blue thermal feature in the park's ...

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 ...

Decades ago, the Morning Glory pool at Yellowstone National Park was a gorgeous deep blue. But because tourists have thrown coins, rocks, and trash into it for years, the spring has now turned ...

With its blue hue, this is what Yellowstone's Morning Glory pool looked like in 1940. Edwin L. Wisherd/National Geographic Creative/Corbis But then, the water’s color changed.

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 ...

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 ...