This site is described on the web site of the Sociedad Espeleológica
Alto Duero who have explored it. It would appear that the entrance has been
located with GPS but the altitude (in brackets above) is wrong when plotted
on 1:5000 maps.
A 20m diameter entrance has the first pitch of 10m which leads immediately
onto the second, choked pitch of 17m. About 10m down the final pitch there
is a window onto a small parallel shaft of 7m.
Reference: SEAD website; file
Entrance picture: on the SEAD website
Underground picture(s):
Detailed survey: elevation on the SEAD website
Line survey:
On area survey:
Survex file: