Located in Butte, a former open-pit copper mine, closed in 1982. The pit is laden with heavy metals and dangerous chemicals. It is one of the largest Superfund sites.

After you pay a modest admission, you exit the side door and enter what looks like a mine entrance and then a long tunnel.

One mile long, a half mile wide, 1780 feet deep, filled with heavily acidic water to a depth of 900 feet. Too many birds have died here. A type of sonic bird scarer goes off periodically to keep birds from hanging around.
































































