Deep within the Tapir Mountain Nature Reserve lies one of the world’s most awe-inspiring and mysterious cave systems—Actun Tunichil Muknal, or the ATM Cave. This full-day expedition is a true blend of adventure, archaeology, and raw jungle immersion. To reach the cave, we trek across jungle trails and river crossings, encountering the region’s thriving flora and fauna. Inside, we navigate chambers filled with ancient Maya ceremonial artifacts, pottery, skeletal remains, and mesmerizing stalactites and stalagmites. The ATM Cave is a sacred site where the Maya once performed ritual sacrifices to appease their gods—most famously, the “Crystal Maiden,” a fully intact skeleton of a young sacrificial victim, preserved by mineral deposits. This is a once-in-a-lifetime journey into Belize’s heart of mystery.