Caye Caulker is a small Caribbean island off the coast of Belize. It’s divided by a narrow channel called the Split, where there’s a bar and a sandy beach. To the south is the island’s only settlement, known as Caye Caulker Village. The north of the island is home to dense mangrove forest and diverse birdlife, protected by a forest reserve. The Caye Caulker Marine Reserve has dive sites on the Belize Barrier Reef.

The island was visited by Erik Jones, Kira Ashton, Walker Ashton, Amber Fox, and Axel Hunley on their search for Enigma Island. The team used it as a stop to refuel and prepare to search underwater for a beacon transmitting the missing half of Enigma Island's coordinates.