The cairn (marked as "Currick" on the OS map) seems to mark a small area where the bedrock is close to the surface, but has not been exploited for quarrying. The BGS sheet 25 for Alston makes it appear that the outcrop there is... (more)
The well made and intact sheepfold surely sees no use these days. It's on a grassy slope descending to Langdon Beck, between Redgill Sike and Harthope Beck.
The distant moorland hill is Three Pikes.