UNESCO World Heritage site Chichen Itza passes into state hands on March 29, 2010

Chichen Itza Mexico
Souvenir sheet of 5 stamps 
Pelota ring, Jaguar Temple, serpent head
Colonnade
Observatory
Catillo, jaguar head
Chac Mool
Issued by Mexican Post Office June 13, 2007
Designer: Rodolfo Espíndola Betancourt

Until 2010, the site was privately owed. The Yucatán government purchased the extensive site and is now under the protection of the Instituto Nacional de Antropología e Historia. 

This sacred site was one of the greatest Mayan centres of the Yucatán peninsula. Throughout its nearly 1,000-year history, different peoples have left their mark on the city. The Maya and Toltec vision of the world and the universe is revealed in their stone monuments and artistic works. The fusion of Mayan construction techniques with new elements from central Mexico make Chichen-Itza one of the most important examples of the Mayan-Toltec civilization in Yucatán. Several buildings have survived, such as the Warriors’ Temple, El Castillo and the circular observatory known as El Caracol. 
Pre-Hispanic City of Chichen-Itza – UNESCO World Heritage Centre