The caves are fascinating. I would urge any potential visitors to first read all the information on the cave's website. (cuevadelapileta.org) Our Spanish is poor and there was very little English spoken on the tour. When speaking English, the guide's accent was so heavy that I had trouble understanding her. If we had read the history and general information on the website first we would have enjoyed our visit more. The going is a bit tough. This is not a tour for young children. Beware that there is a steep 10 minute climb on irregular rock "stairs" from the parking lot to the cave entrance. Wear waterproof shoes with good tread as the cave floor is irregular and wet. It was not cold in the caves - I wore a light sweatshirt over a tee and was comfortable. All that being said, it was a very worthwhile experience.