Eleven hours from Ambergris Caye to a Maya ceremonial cave in Cayo, with a licensed ATM guide on the mainland and no island hotel pickup.
Updated 2 November 2026
In shortThe ATM cave tour from San Pedro is an 11-hour day that takes you off the cayes to Actun Tunichil Muknal in Cayo, where a licensed ATM cave guide, working in English, leads the jungle approach, the stream crossings, the swim-in entrance and the route through the ceremonial chambers. It starts from $400 per person and includes transportation on the mainland, the entrance fee, water and juices. It suits travellers based on Ambergris Caye or Caye Caulker who can hand over a whole day and are comfortable moving through wet, slippery, uneven ground.
11 htour length
from $400per adult
★ 5.06 reviews
What the ATM cave tour from San Pedro involves
Eleven hours, from $400 per person, and most of that time is spent moving. The tour takes you off Ambergris Caye or Caye Caulker to the mainland, then by road into the Cayo District, where Actun Tunichil Muknal lies inside Tapir Mountain Nature Reserve, 6,286 acres of lowland tropical evergreen forest. A licensed ATM cave guide meets you in Belize City and stays with you for the rest of the day.
The cave is two things at the same time: an active river cave and a Maya ceremonial site where the offerings are still where they were left. Ritual use began in the Early Classic Period, dated by NICH to A.D. 300-600, and the upper dry chamber holds 14 sets of human skeletal remains, the best known being the calcified 'Crystal Maiden'. Pottery and ritual evidence stay in place instead of sitting in a museum case, which is why the procedures inside are strict and the guide repeats them.
All cameras and electronic devices have been banned inside since May 2012 by government rule, after a dropped camera damaged a skeleton. Visitors enter empty-handed and only the guide carries a dry bag. Footwear comes off in the artifact chambers and socks are compulsory, a modest dress code applies, so leave swimwear-style tops and sleeveless shirts in your bag, and photo ID is required. Groups are capped at six visitors per ATM-certified guide, with larger parties split between guides.
The length is the one thing to weigh before you pick this version. If you have three nights on Ambergris Caye, this day uses one of them completely and starts early. Travellers who would rather spend less of the day in transit should move to San Ignacio for a night and take one of the Cayo departures, which run 7.5 to 9 hours. Book the cave early in your trip and keep a spare day after it: the Institute of Archaeology closed the cave on Sunday 18 October 2026 because river levels rose after days of heavy rain, and reopened it the next morning.
A.T.M Cave (Actun Tunichil Muknal) from San Pedro
Eleven hours, from $400 per person, with a licensed ATM cave guide, transportation on the mainland, the entrance fee, water and juices. You reach the mainland independently and meet the guide in Belize City.
Actun Tunichil Muknal (ATM)300 min About five hours from the start of the approach to the return to the activity base. After the road transfer comes a roughly 45-minute flat jungle hike with three stream crossings, the first knee- to waist-high and fitted with a rope for support, then a 10-15 second swim of roughly 20 feet across the spring-fed pool at the cave mouth, in helmet and life jacket. Inside there is about 90 minutes of wading no deeper than chest height, swimming through narrow passages, climbing over rock obstacles including a waterfall, and a 12-foot ladder up to the dry level and the chamber called The Cathedral, where the guide explains the archaeology. Conditions are wet, slippery and uneven the whole way, and you follow the licensed guide's instructions.
Photos: ours and the tour operator's
What is included
Included
Water
Licensed ATM cave guide
Transportation
Juices
Entrance fee
Not included
Gratuities
Cameras and recording devices, which are strictly prohibited inside ATM cave
Closed-toe shoes with grip, socks, quick-drying clothes and a dry change, which you bring yourself
Meeting point and pickup
Air option: there is no island hotel pickup. You travel independently to the San Pedro or Caye Caulker airport, check in and board on your own, and the flight is included only if the chosen option says Flight Included. You meet the guide in the Belize City airport arrivals area.
Water taxi option: again no island hotel pickup. You travel independently to the San Pedro or Caye Caulker water taxi terminal, check in and board on your own, and the water taxi is included only if the chosen option says Water Taxi Included. You meet the guide outside the Belize City terminal exit.
Ages: child 5-9, adult 10+. NICH policy admits only visitors at least 40 inches tall, and one licensed operator advises against children under 12.
Bring closed-toe shoes with grip, socks, quick-drying clothes, a dry change and photo ID. Water inside the cave sits at a constant 78°F.
Other San Pedro options compared with this ATM cave tour
The three alternatives below are cave tubing and zipline days, not routes into Actun Tunichil Muknal, so they are shorter, cheaper and involve no archaeology or ceremonial chambers. Take one of those if 11 hours is more than your itinerary can give or if someone in the party cannot meet the ATM age and height rules, and take this page's tour if the skeletal remains and the ritual chambers are the reason you are going.
Tour
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Rating
A.T.M Cave (Actun Tunichil Muknal) from San Pedro (this page)
Access is widely reported to be capped at 125 visitors per day across all licensed operators, so dates sell out, and wet-season tours between May and November can be cancelled after heavy rain. Place this day early in your Belize itinerary and leave a spare day after it.
