Actun Tunichil Muknal
Ruins Cave archaeological site with Maya ceremonial remains and artifacts
Actun Tunichil Muknal, a cave near San Ignacio, offers guided spelunking tours to see Mayan ceramics and human remains; visits involve wading river passages and strict archaeological protections.
Actun Tunichil Muknal (often abbreviated ATM) is a Maya ceremonial cave and archaeological site in Belize noted for in-situ skeletal remains and ceramic offerings. The cave contains calcified human bones, ritual ceramics and other artifacts left in place by ancient Maya rituals.
Access to the site is by guided tour only and involves a trek that includes river crossings and wading through cave passages to reach the main chambers. The most famous find is a calcified human skeleton nicknamed the “Crystal Maiden,” left in an exposed chamber where calcite has partly crystallized on the bones.
Archaeological evidence places ritual use of the cave in the Classic period of Maya civilization, when caves were important sacred places for offerings and ceremonial activity. The site has been documented and conserved by archaeologists, with visitor programs designed to minimize impact on remains and artifacts.
The cave lies within Belize’s karst landscape in inland forested terrain and is reached from nearby trailheads by a guided approach; the precise access route is managed by licensed guides and tour operators.
- Guided access & photography rules: Tours require a licensed guide and include a wet cave hike; photography is prohibited inside the cave to protect human remains and fragile artifacts.
How to Get to Actun Tunichil Muknal #
Actun Tunichil Muknal (ATM) is reached from the San Ignacio area in western Belize and visitors must go on a guided tour with a licensed operator. Tours typically involve a drive from San Ignacio to the trailhead followed by river crossings and a hike into the cave (tour hikes commonly include wading and moderate walking). Book a tour in advance with a registered operator in San Ignacio - private travel into the cave without a guide is not permitted.
Tips for Visiting Actun Tunichil Muknal #
- Book a licensed guide and reserve your tour well in advance - small-group, guided trips into ATM sell out, especially in high season.
- Try to get on the first tour of the day to avoid heat and larger groups later; guides control access and timing for sensitive areas.
- Follow the guide's instructions exactly inside the cave: artifacts and human remains are fragile and touching or handling them is prohibited, and some sections require wading and scrambling.
Best Time to Visit Actun Tunichil Muknal #
Best during the dry season (February-May) when river levels are lower and the guided cave tour is safest and most reliable.
Weather & Climate near Actun Tunichil Muknal #
Actun Tunichil Muknal's climate is classified as Tropical Monsoon - Tropical Monsoon climate with consistently warm temperatures year-round. Temperatures range from 17°C to 32°C. Abundant rainfall (1883 mm/year), wettest in July.
January
January is mild with highs of 27°C and lows of 17°C. Significant rainfall (116 mm).
Comfort
Weather
February
February is mild with highs of 28°C and lows of 18°C. Moderate rainfall (65 mm).
Comfort
Weather
March
March is warm with highs of 30°C and lows of 19°C. Moderate rainfall (50 mm).
Comfort
Weather
April
April is warm with highs of 31°C and lows of 21°C. Moderate rainfall (44 mm).
Comfort
Weather
May
May is the warmest month with highs of 32°C and lows of 22°C. Regular rainfall (85 mm).
Comfort
Weather
June
June is the warmest month with highs of 32°C and lows of 22°C. Heavy rain (249 mm).
Comfort
Weather
July
July is warm with highs of 31°C and lows of 22°C. The wettest month with heavy rain (278 mm).
Comfort
Weather
August
August is warm with highs of 31°C and lows of 21°C. Heavy rain (208 mm).
Comfort
Weather
September
September is warm with highs of 31°C and lows of 22°C. Heavy rain (226 mm).
Comfort
Weather
October
October is warm with highs of 30°C and lows of 21°C. Heavy rain (216 mm).
Comfort
Weather
November
November is mild with highs of 28°C and lows of 19°C. Significant rainfall (183 mm).
Comfort
Weather
December
December is mild with highs of 27°C and lows of 18°C. Significant rainfall (163 mm).
