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

The site was effectively closed to tourists for several years because of guerrilla activity in the region along with concerns about the impact of unregulated tourist traffic. It was reopened to visitors in 2009, and today there are several Colombian Tourist Agencies that will fly travelers to La Macarena. From there, they must make their way to the river site on horseback (or donkeyback) and by foot as part of a guided tour. Visitors are not permitted to stay overnight or cook.
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.