The oldest ruins of the Mayan city-state known today as Palenque date back to the 5th century BC. A city-state after the fall in the 9th century AD the jungle overgrown. The Spaniards first found themselves in Palenque in 1567, and in 1773 the exploration of the ruins began.
The most important buildings are Temple of the Inscriptions, Temples of the Cross group, Palace.
Among other things, the jade mask of King K'inich Janab Pakal and the mask of the Red Queen were found in the Palenque tombs.
By 2005, an area of approximately 2.5 square kilometers had been exposed from the jungle. It is estimated that it is not even 2% of the area occupied by the city-state, and over a thousand objects are still covered by the jungle.
Currently, Palenque is part of the Zona Arqueológica de Palenque (INAH) and the Parque Nacional Palenque. The Palenque houses the Museo de Sitio de Palenque 'Alberto Ruz Lhuillier' and the Museo del Textil Lak Puj Kul.

Zona Arqueológica de Teotihuacán includes the ancient Mesoamerican city with the Pyramid of the Sun, Pyramid of the Moon, Temple of Cetzalkokal. Open to public visiting since the 1920s. The area open to visitors is currently 264 hectares.

Tulum is a former Mayan city that was surrounded by a wall.
Its history dates back to at least the 6th century AD. Its peak development falls between the 13th and 15th centuries. After the occupation by the Spaniards in the 16th century, the city was deserted.
Main historic buildings: Temple of the Frescoes, Temple of the Descending God, El Castillo.