HELENA, Mont. — Butte’s Berkeley Pit is infamously known for its toxicity, but it’s also the site of vital minerals and rare earth elements.

Discover the haunting story behind the Berkeley Pit in Butte, Montana—a former open-pit copper mine that has turned into one of the most toxic lakes in America. This video dives into the history ...

BUTTE, Mont. — The Berkeley Pit is as infamous as it is deep, a sobering reminder of the perils of Butte’s rich mining history. But now, it could become a vital repository for the ongoing ...

The Berkeley Pit in Butte, Montana is so acidic it has the potential to fry birds inside out in a matter of hours. Locals, such as Mark Mariano, use a variety of methods to scare them away.

The Berkeley Pit in Butte, Montana, has been a source of environmental concern for decades, as its waters—highly acidic and teeming with toxins—have seeped into the surrounding area. But today ...

Montana Tech sampled Berkeley Pit water successfully for the first time last week from its remote control boat, shown in this photo taken July 19. Tech professor Bryce Hill said ...

The area surrounding the Berkeley Pit — a man-made lake of toxic water in Butte that would likely kill a human or animal that drank from it — is teeming with life.