Booked a tour with our cruise line and it was the highlight of our entire cruise trip. We've been to Cozumel many times and we were looking for a unique experience. We found it at Rio Secreto. Our guide, Benito, was great. He did a great job with the young kids in our group and keeping everyone together. He did a great job in letting us know where to step, sharp rocks, how to maneuver some of the trickier areas but I could not have done it without a walking stick. The stick saved me quite a few times. Don't know how some folks in our group did it without the walking stick. The cave was truly stunning and the experience of sitting in total darknesss for a moment was priceless. We were in the cave for about 1 1/2 hours and the time went by very quickly. No cameras are allowed and they do have a photographer following you around but the photos are quite expensive at $25.00 for a single photo. Nevertheless, we bought one we just felt we needed a photo to capture this unique experience.