This large rainforest region is irrigated by several large rivers and is sparsely populated. The area has 57% of the territory of the nation and most of its mineral resources. It has been heavily exploited, but much natural diversity remains. The Rio Coco is the largest river in Central America; it forms the border with Honduras. The Caribbean coastline is much more sinuous than its generally straight Pacific counterpart; lagoons and deltas make it very irregular.