The R�o Hondo in northern Belize is the border with our neighbor Mexico. The river has its headwaters in Guatemala, where it is known as the R�o Azul, or Blue Creek in Belize. The river runs 230 kilometres from its headwaters into the Bay of Chetumal, known in Belize as the Corozal Bay. Interestingly, R�o Azul runs in a southerly direction from Guatemala into Belize, but then takes a determinedly sharp turn to the north at La Uni�n where it becomes the R�o Hondo, making for Belize's characteristic natural border with Mexico. This video from Mileneo is in Spanish and gives an excellent tour of the river.