Lead by an experienced native guide, hike about 30 minutes uphill to the entrance of the cave. The unassuring entrance opens into a vast array of winding limestone passageways and tall, narrow rooms filled with ancient Maya pottery dating back 1500-2000 years. A ladder allows access to the upper areas of the cave and in some cases ropes are used for narrow passages. At the end of the cave is a large room believed to have been used for sacrificial ceremonies. Evidence of a sacrificial altar is still evident. This tour requires a certain degree of physical fitness. The cave is about 30 minutes from San Ignacio and the tour requires about 4 hours.