Updated 20th November 2008

The original description of this cave (discovered and explored in 1982): The entrance is in a line of clints opposite Cueva de Dofrades (042).  A slope down to an old chamber with lots of dripping stal. Burrowing about leads to a second small chamber with a passage on the left ending at an undescended 5m dribbling shaft.
The site was refound in 2008 as Cueva Chispas (using site number 3070) and it was only when reading the log book account and original sketch map was it realised that Grasienta with it's daylight shafts had been rediscovered. The entrance position was also significantly different.
The entrance is a rift in the limestone. A scramble down on the right enters passage which turns sharp left. It goes under a daylight shaft to a chamber about 8m in a diameter, with a second daylight shaft coming in on the left. Side-passages on the right and on the far side of the chamber all quickly choke. A step up at the southern end of the chamber leads to a passage, under a third shaft, which ends in a slot down into a well-decorated chamber. At the top of a flowstone slope two passages on the left unite in a small chamber, while in the opposite direction a narrow rift becomes too tight. Just to the left of the small chamber, a 5m pitch drops to a calcited slope and choke. A short traverse around the right hand side of the hole enters a small passage which ends with tiny rocks, presumably dropping through from the surface.

References: anon., 1982 (logbook); Corrin J, 1983c; material in file; from 2008f (autumn logbook); Corrin Juan, 2009
Entrance picture : yes
Underground picture(s): yes
Detailed Survey : pdf file
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.)