El Mirador is undoubtedly one of the largest and most important Mayan cities, not to mention that it is also one of the oldest archeological sites in the world. It is located in the middle of a thick and almost unexplored jungle, in the municipality of San Andrés, Peten. The buildings and structures of this ancient Mayan city are part of the "Late Preclassic" period of Mayan history. Name The Mirador (The Viewer) was given by the way it was first discovered in 1926.