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

Geology
The rocks of the Macarenia reach 1200 million years old and are an extension to the west of the called Guiana Shield of Venezuela, Guyana and Brazil, whose rocks are considered the oldest in the world. The rocks of the region belong to the sedimentary cover of the Guaiana Shield. The biological significance of global of the Macarenia is because part of three ecosystems rich in diversity of flora and fauna: Andes, Eastern Llanos and Amazon rainforest. "Every new germs gap rush stations", says José Eustasio Rivera in La Vorágine, referring to this type of vegetation.
In the jungle of the Macarenia struggle for nutrients for the soil to populate various fungi that help break down the trunks of trees.
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.