If you choose to pay the $2 admission to enter the viewing platform, you'll see a one-mile-long, half-mile-wide, 1780-foot-deep hole. Operating as a mine from 1955 to 1982, the pit is now filled ...

Plant life at the Berkeley Pit may actually hold the key to helping mine-damaged lands recover their vitality. Montana Tech researcher Grant Mitman is doing research with a kind of moss he found ...

The reason the Berkeley Pit's fog hasn't been studied, ... Scavenged chemicals can also react inside fog droplets to create new species that may be harmful to health," Collett said via email.

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 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.

At the Berkeley Pit, researchers hope to extract valuable metals to increase U.S. production of rare earths used in electric cars, medical advances and national defense. Ongoing extraction inside ...

In the ’90s, the town promoted mining tourism, opening a roadside gift shop and charging visitors to gaze at the Berkeley Pit’s metal-melting waters. In 2006, The Daily Show visited.

Butte’s Berkeley Pit is thawing out after low temperatures last week froze the water inside. Montana Resources vice president Mark Thompson tells NBC Montana it’s been a few years since the ...