A small cave which goes in about 4m to a choke.
[The position above is the average of three readings which ranged from ..799 to ..807 in the easting and ..358 to ..395 in the northing, adjusted to ETRS89 datum]

Reference: anon., 2012d (summer logbook)
Entrance pictures : yes
Underground pictures :
Video :
Detailed Survey :
Line Survey :
On area survey :
Survex file :