Caño Cristales is a Colombian river located in the Serrania de la Macarena province of Meta. The river is commonly called "The River of Five Colors" or "The Liquid Rainbow," and is referred to as the most beautiful river in the world
Santa Marta, Colombia -- La Ciudad Perdida (The Lost City). Hidden (literally) in the crevices of northern Colombia’s Santa Marta Sierra Nevada mountain range, La Ciudad Perdida was built by the Tayrona people around 800 AD.
Beautiful colonial streets of Cartagena de Indias, Colombia - This would be a beautiful place to visit. Interesting food and genuinely nice natives, but there is always a sense of insecurity in a developing nation.