we were lucky and the only visitors.
First of all, the ride until the cave is very beautiful with so many different rockformations. And the visit with a very friendly young guide who spoke very well english pleased us a lot. I suggest to make the ride and go back in history.
It's a bit of a drive, no matter if you've rented a car or are going on a guided tour but every second is worth it - and while the access roads are bumpy and a bit dusty, the opportunity to see unique wildlife pays off. We saw an armadillo, countless guanacos, wild ostrich and flamingos just on the way...