A bit about it:-I really have no idea but I'll try to find some info if it is possible.
Brief Description:
This is a large area of abandoned limestone quarries, also known as Herbert’s Quarry, in the Brecon Beacons National Park Black Mountain region.
The lime from the quarries was used in a great many industries from farming and building to iron production. The quarries were in constant use until production ceased in the 1950s.