072 Sima de los Hoyos
Cubija 30T 0450448 4796449 Alt. 276m  Length 200m Depth 33m

Updated 3rd May 2007; 3rd May 2009; 4th October; 13th December 2010

A 22.5m drop off the western side of the pot lands on boulders. A short crawl on the right hand side leads to a large (25 x 35m) chamber with a well decorated, low passage leading off for approximately 70m and choked at the end. A junction half way along this passage leads to a well decorated chamber with empty gour pools and stal ending at a flowstone wall. A slot in the floor chokes after 4m.

To the left of the pitch chamber, a route leads down a loose boulder slope to a 25 x 25m chamber. A calcited skeleton of a possible bear with 4cm long incisors and a 35 x 15cm skull lies in the centre of this chamber. A number of other bones and antler remain litter the floors. At Easter 2009, photographers removed boots and walked around in wetsuit socks to conserve formations and deposits.

References: Kendal Caving Club and Manchester University Speleological Society, 1975; Corrin J S and Smith P, 1981; anon., 1994b (logbook); material in file; Corrin J, 1994b; anon., 2007b (Easter logbook); Corrin Juan, 2007a; anon., 2009a (Easter logbook)
Entrance picture : yes
Underground picture(s):
interactive panorama photos of the chamber: 1 2
photos from summer 2010
photos from Easter 2009
bones, skeletons and formations (Easter 2007)
Detailed Survey : 1:500 pdf
Line Survey :
On area survey :
Survex file : yes