3012: CTB, Cueva
San Antonio 30T 446739 4801238 (Datum: ETRS89. Accuracy code: G) Altitude 107m
Length 40m
Area position

Updated 7th November 2009; 6th October 2013; 6th January 2018

There are three entrances close together in a rock outcrop around the side of a depression. The left hand two choke almost immediately but the third starts as a low crawl changing quickly to hand-and-knees and then walking in a 1 x 2m passage. The cave ends in a chamber.
In the summer, 2009, the terminal dig was excavated for 2.75m to enter a 12m segment of large, old cross passage. To the west, a 4m climb up enters 8m of inlet passage.The main passage drops down to the east to a blocked sink. Both ends of the old level are blocked with boulders. Total length of the extension is about 20m, but it hasn't been surveyed.
The area was described as having "more slurry" in August 2013.

Reference: anon., 2008e (summer logbook); anon., 2009c (summer logbook); anon., 2013d (summer logbook)
Entrance pictures:
Underground pictures : August 2009
Video :
Detailed Survey : 2008 pdf file : sketch of the 2009 extension
Line Survey :
On area survey :
Survex file : yes (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)