Belize's barrier reef — the second largest in the world — acts as a natural wall that keeps sargassum from reaching the inner lagoon beaches. Ambergris Caye and Caye Caulker sit inside that protected zone, with calm, clear water year-round.
Belize sits on the Central American Caribbean coast with a massive barrier reef running parallel to the shoreline. The reef creates a protected lagoon on its inner side where most beach destinations are located.
The barrier reef provides excellent natural protection from sargassum for the inner lagoon beaches. Ambergris Caye and Caye Caulker stay largely clear. The ocean-facing (eastern) side of any island can still see sargassum — stick to the lagoon side for consistently clear water.
The Belize Barrier Reef — second largest in the world — was both a navigation hazard and a natural fortress for the ancient Maya, who built coastal trading cities along its shores for over a thousand years. British pirates and logwood cutters settled Belize in the 17th century, using its labyrinthine cayes to hide from Spanish warships and harvest logwood — a tree whose heartwood produced the purple dye that colored the British Royal Navy's uniforms. The Great Blue Hole, a UNESCO World Heritage site, is an underwater sinkhole 300 meters wide and 125 meters deep, formed during the last ice age and first brought to world attention by explorer Jacques Cousteau in 1971.
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