An earth collapse at the base of a very shallow vally running up the side of the hill to Cueva Subterranea (0029). The valley has a number of these features around and above this lowest site. Might be worth a look when there is less vegetation.

Reference: anon., 2000c (Summer logbook)
Entrance picture:
Underground picture(s):
Detailed survey:
Line survey:
On area survey:
Survex file: