Colombia - Caño Cristales
La Macarena Natural Reserve represents a unique slice of biogeography, and is a meeting point of the territories of the Amazon and of the Orinoco. One of the best-known attractions is the astonishing river “Caño Cristales”, commonly called "The River of Five Colors," "The Liquid Rainbow" and "The Most Beautiful River in the World" because of the algae that produces vibrant colors and gives this river its unique beauty.