A stunning river running from Lake Izabal, in the eastern part of Guatemala, to the Carribean, Rio Dulce is filled with alluring animals, caves, and spectacular cliffs. A boat ride down the river will take you to the interesting, laid-back town of Livingston. Also located along the river is Castillo de San Felipe, an old Spanish fort, which was an important transship staging point for the Spanish and pirate lookout.