We found a hidden tunnel that led straight into an abandoned soapstone mine – and what we discovered inside was incredible.

Wyoming's Brook Mine that aims to reduce U.S. foreign reliance on critical minerals for defense, technology and clean energy ...

The Cerro Colorado Mine was named by Samuel P. Heintzelman, who discovered it through a Mexican whom he had swindled out of $500. The mine produced $100,000 during its first year of operation.

The mine, which employees 108 people, had fed the Sherburne County Generating Station in Becker, Minnesota since the early 1980s, but had seen steep declines in production as the 2,235-megawatt ...

An incline tramway was built in 1885 from the mine entrance to the ore bins of a 20-stamp mill on the east slope of Ben Nevis Mountain. Formerly known as the Hermosa 20-stamp mill, it was hauled ...