Rafting through the Cañon del Güejar means traversing through 500 million-year-old rock formations amid the Sierra de la Macarena (Macarena Mountain Range), one of the world’s most biodiverse areas. It is part of the Guiana Shield, an ancient geological formation that spans parts of Colombia, Brazil, Guyana, Suriname, French Guiana, and southern Venezuela. It is a ride through archaic landscapes, primeval forests, and the cascading waterfalls of the Rio Güejar (Güejar river). The region is relatively new to tourism. Until about 10 years ago, it was controlled by FARC guerillas…