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 ...

Morning Glory Pool in Yellowstone National Park used to appear as a dazzling crystal-clear blue until decades of trash and debris changed the color.

Glacier has welcomed 346,437 visitors so far this year—12% more than the same period last year and a whopping 31% more than ...

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 ...

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.

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 ...