ATM Cave tour San Ignacio: Mayan artifacts & Crystal Maiden

Wade into a 5-kilometer underground museum of Mayan ritual and remains

Actun Tunichil Muknal is a cave tour from San Ignacio that takes you 5 kilometers into the Tapir Mountain Reserve to see ancient Mayan artifacts, over 14 human skeletal remains, and the Crystal Maiden: an intact female skeleton covered in mineral deposits left from ceremonial rituals. The tour runs 8 hours with a guide, lunch, air-conditioned vehicle pickup and all gear included. Children from age 11 are welcome, and you need at least moderate fitness for wading and climbing inside the cave.

Step-by-step itinerary

Explore ATM Cave and Mayan artifacts

• Enter hourglass-shaped cave entrance
• See clear blue perennial stream waters
• View ancient tools and pottery
• Learn Mayan Civilization history
• Explore deeper cave areas
• Observe sacred burials
• See Crystal Maiden remains

The experience

Actun Tunichil Muknal, the Cave of the Stone Sepulchre, sits in the Cayo District near Roaring Creek and was first discovered in 1989. National Geographic rates it the #1 cave in Central America. The Mayas used it for ceremonial purposes during the Classic Period, and as drought deepened, the rituals moved farther into the cave, closer to what they believed was the dwelling of Chaak, the rain god. You wade through a perennial stream that flows the length of the cave, passing crystalline stalactites and stalagmites, and encounter the artifacts and remains the Mayas left behind: pottery, tools, and the skeletal remains of men, women and children positioned where they were placed for ritual purposes.

The tour starts with pickup from your San Ignacio hotel in an air-conditioned vehicle. Once at the cave entrance, you receive a helmet, headlight and life vest (optional), then enter the hourglass-shaped opening where the stream begins. Your guide leads you deeper into the cave over 8 hours, explaining the history and significance of each section. The most notable stop is the Crystal Maiden, an intact female skeleton whose remains are covered in sparkling mineral deposits: a burial left as a sacrificial offering for agricultural fertility. You'll also see ancient pots, tools and other artifacts positioned throughout the interior chambers.

Lunch is included and typically eaten near the cave entrance before or after your underground exploration. The full day accounts for travel time from San Ignacio, the cave exploration itself, and the return journey. Because the cave involves wading through water, climbing over rocks and navigating tight passages, a moderate level of physical fitness is necessary. The water is cool but not cold, and the path is well-established. Your guide sets the pace and can adjust for the group's comfort.

What’s included

• Air-conditioned vehicle pickup from your San Ignacio hotel.
• lunch.
• helmet, headlight and life vest for the cave exploration.
• English-speaking guide throughout the tour.

Before you book

Days and timesEvery dayDeparts at 08:00

Book up to2h before

AgesAdult (18 to 64 years) · Senior (65 to 85 years) · Youth (15 to 17 years) · Child (11 to 14 years) · Under 11: can't be included in the booking

GroupUp to 8

Live guideEnglish

Meeting point and pickupHotel pickup is optional; you can also go straight to the meeting point. Ends back at the starting point.You can choose from 13 pickup points.Operator's directions: “Our office is on the first flow of Venus Hotel in San Ignacio Town.”

Cancellation and refundsFree cancellation up to 24 h before the start. After that, no refund.It may be canceled due to bad weather or if the minimum number of travelers isn't reached. If that happens, you're offered another date or a refund.

Prices and times updated 8 days ago

Good to know

Moderate physical levelInfant seats availableNot for heart conditions

Operated by Tukan Shuttles & Adventures

Is this one for you?Book this tour if you have at least moderate fitness for wading through water and climbing over rocks in a cave environment, and are comfortable in confined underground spaces. The 8-hour commitment and physical demands are what make the full depth of the cave and the Crystal Maiden itself reachable in a single day.

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Top questions

Can children come?

Yes. Ticket types: Youth (15 to 17 years); Child (11 to 14 years). Under 11: they can't be included in the booking.

What happens if it rains?

It may be canceled due to bad weather. If that happens, you're offered another date or a refund. Free cancellation up to 24 h before the start.

What is the Crystal Maiden and why is she significant?

The Crystal Maiden is an intact female skeleton whose remains are covered in sparkling mineral deposits from the cave environment. She was placed in the cave as a sacrificial offering during the Mayan Classic Period, believed to be a ritual for agricultural fertility.

How deep into the cave do you actually go on this tour?

The cave itself is 5 kilometers long, and your guide takes you through the most significant sections, from the entrance where most ceremonies took place, deeper into the interior chambers where the most sacred rituals occurred and where the skeletal remains are positioned.

Do I need to be a strong swimmer for the stream inside the cave?

No. You wade through a perennial stream that flows throughout the cave, but it is not deep or fast-moving. The water is cool and the path is established. Your guide leads the group and adjusts the pace. Moderate physical fitness and comfort with water are what matter, not swimming ability.

What gear do I need to bring, and what is provided?

The tour provides a helmet, headlight and life vest (optional). Wear water shoes or sandals that can get wet, and bring a change of clothes and a towel for after. The vehicle pickup, lunch and all safety equipment are included in the tour price.

How far is Actun Tunichil Muknal from San Ignacio?

The cave is located in the Tapir Mountain Reserve of the Cayo District near the village of Roaring Creek. Hotel pickup from San Ignacio is included, and the full tour is 8 hours, which accounts for travel time to and from the cave plus the underground exploration.