Editing Geography of Colombia (section)

===Amazon region===
{{Main|Amazon Region of Colombia}}

Many of the numerous large rivers of eastern Colombia are navigable. The [[Río Guaviare]] and the streams to its north flow eastward and drain into the basin of the [[Río Orinoco]], a river that crosses into Venezuela and flows into the Atlantic Ocean. Those south of the Río Guaviare flows into the [[Amazon Basin]]. The Río Guaviare divides eastern Colombia into the llanos subregion in the north and the tropical rainforest, or selva, subregion in the south.