Penarth and Cambrian Slate Mines were crucial Welsh operations, evolving from early extraction into significant industrial sites before their mid-20th-century closures.

A 19th-century slate quarry, known for its extensive underground workings and rugged mountain setting.

Part of the longest continually operated slate mine in the world until its closure in 2003.

Serving as a drainage channel for a popular Welsh quarry.

A Former slate mine active from 1820 to 1970, is now a flooded "Car Cave" filled with abandoned vehicles and appliances.

Maenofferen Slate Mine in Blaenau Ffestiniog is a historic Welsh quarry that grew into a major slate producer in the 19th century.