There’s a new milky blue pool in Yellowstone National Park.

Yellowstone National Park closed the Madison River, the Firehole River and the Gibbon River downstream of Norris Campground, as well as those rivers’ tributaries, on July 12. Fishing draws about 50,000 visitors to Yellowstone each year, according to the park’s website.

Beneath Yellowstone National Park lies a complex and extensive volcanic system. Trump administration pulls $4B in federal funding for California's bullet train project What happened when the Trinity test bomb detonated,