Caño Cristales, The River Of Five Colors, Serrania De La Macarena, Meta, Colombia

The small circular pits, -giant's kettle- that characterize the river bed have been opened by high hardness minerals. When one of these hard mineral fragments fall into one of the cavities, large or small, begins to brushing rotate with the cavity wall and increases the dimensions of the well.
Fauna and flora
Caño Cristales has aquatic plants and corals. Its red color is characteristic of endemic plant species corresponds to Macarenia clavígera, plant identified by biologist Jesús Idrobo.