Protecting Mexico's Mayan and Aztec treasures
26 February 2011 Last updated at 01:22 GMT
Mexico has one of the richest archaeological heritages in the world thanks to the ancient Mayan and Aztec civilisations.
But the looting of archaeological sites and trafficking of ancient relics means much of the heritage is disappearing - smuggled and sold abroad for thousands of dollars.
The ancient city of Teotihuacan, north of Mexico City, is probably the best known archaeological site in Mexico.
Julian Miglierini visited the dig site to see some of the artefacts that the country's government is trying to save.