Ambergris Caye is a narrow 25-mile-long strip of land that is separated from Mexico in the north by the narrow Bacalar Chico channel. The Maya people dug this Channel 1,500 years ago. One half mile to the east is the Belize barrier reef, second longest barrier reef in the world, which continues some 190 miles along the length of Belize. Ambergris Caye is the most active and happening Caye; with the best dive shops, the most restaurants, the biggest selection of accommodations, and an exciting night life, the main town of San Pedro makes for a great destination.