The ATM Cave Tour in Belize begins with a 45-minute jungle hike and three river crossings before entering the legendary Actun Tunichil Muknal cave system. Expect to get completely wet as you swim through the cave entrance and spend the next three hours climbing rocks, swimming through chambers, and exploring narrow passages like the famous “Headlock.” Inside, you’ll discover ancient Maya ceremonial areas, over 1,400 artifacts including pottery, tools, and water vessels dating back more than 1,100 years. The cave also contains skeletal remains used in sacred Maya rituals, including the famous “Crystal Maiden,” whose bones became naturally coated in sparkling calcite over centuries. ATM Cave offers one of the most unforgettable archaeological and adventure experiences in Belize, giving visitors a rare glimpse into the sacred spiritual world of the ancient Maya civilization.