Dulce River (Spanish: Río Dulce, or "Sweet River") is a river in Guatemala, completely contained within the department of Izabal. It is part of a lake and river system that has become a popular cruising sailboat destination. The river begins at the point where it flows out of Lake Izabal. At the entrance to the river there is a small Spanish colonial fort, the Castillo de San Felipe de Lara, built to stop pirates entering the lake from the Caribbean when this part of Central America was an impor…