I visited as part of my one-day tour to Torres del Paine. This stop was about 30-45 minutes. We only walked through the main cave, but there are additional walking treks that looked good if you want to put in more time. The cave is awe inspiring. I started imaging myself as a prehistoric human fighting the elements by camping in the huge cave. At the entrance there is a pamphlet in English and several of the signs include an English translation. There is a huge replica of the Miladon that is a great prop for photos. A good side trip if you are in the neighborhood.