The Belize Barrier Reef runs the length of the coast and is the second largest reef system in the world. It shelters a string of cayes — low sand islands with shallow water on the leeward side — where most beach weddings take place.
What distinguishes Belize from the islands further east is that the mainland is genuinely worth a day of its own. Rainforest, river caves, and Maya sites like Xunantunich and Caracol sit within a few hours of the coast, which makes a two-location wedding week realistic rather than aspirational. English as the working language and the Belize dollar's fixed relationship to the US dollar remove the usual small frustrations.