El Tajín

El Tajín is a pre-Columbian archeological site in southern Mexico and is one of the largest and most important cities of the Classic era of Mesoamerica. A part of the Classic Veracruz culture, El Tajín flourished from 600 to 1200 AD and during this time numerous temples, palaces, ballcourts, and pyramids were built. From the time the city fell, in 1230, to 1785, no European seems to have known of its existence, until a government inspector chanced upon the Pyramid of the Niches.

El Tajín, named after the Totonac rain god, was named a World Heritage site in 1992, due to its cultural importance and its architecture. This architecture includes the use of decorative niches and cement in forms unknown in the rest of Mesoamerica.

Source: Wikipedia