Just one of many slate workings in the Tilberthwaite Valley, near Langdale. This was worked on a large scale from the 19th century to the early 60s (small scale).
The quarry was worked as a open pit (now flooded by 150ft) with levels and chamber coning off the bottom, access levels and above the pit.
Most of these levels have now been Obliterated by more modern operations, and those left can only be accessed by diving.