A Labyrinth Beneath
the Living Island
Beneath the sun-drenched streets and sand paths of Caye Caulker — one of Belize’s most popular tourist destinations — lies a world that almost no visitor will ever see. Giant Cave is a kilometres-long cave system of extraordinary beauty, threading through the limestone beneath the island, its passages adorned with stalactites that took millennia to form.
The cave was first discovered in 1977 by Paul Heinerth, who would go on to co-found Belize Diving Services on the island above. In the decades since, explorers have charted roughly 30,000 feet of passage, with maximum depths reaching 180 feet. The system remains one of the most significant cave diving destinations in all of Central America.
Giant Cave is a technical cave diving environment. It is accessible only to divers holding full cave certification, accompanied by a properly trained guide. The system has taken lives. Cavern and open-water certifications are not sufficient for entry.
In 2015, Mark Long returned to Giant Cave with a team of experienced cave divers to document its passages photographically. Accompanied by Annette Long, Bird Oestrich, Diane Oestrich, and Chip Petersen, the expedition produced a remarkable visual record of a cave that few people will ever experience firsthand.
What they found was unchanged by time: vast chambers hung with thousands of stalactites, their dive lights illuminating green-tinged walls and floors of pale limestone silt that had settled undisturbed for centuries. The cave receives no daylight. Sound does not travel the same way. Navigation depends entirely on a guideline and the training to follow it back.
