For those who visit Cancun and the Riviera Maya, the second most attended tour after Chichen Itza archeological zone, is TULUM-XELHA. It is an activity that anyone who visits the Mexican Caribbean should try. 

The archeological zone of Tulum is a sacred space located on the highest zone of the Riviera Maya coast. It was used by the ancient Mayans as observation and defense point against invasions. Here you will understand the connection existing between nature, the sea and Mayan people among an atmosphere that inspires respect and a mystic sensation of union with nature just the way Mayans should have lived. This is one of the few archeological zones around the world set at the edge of sea and is the third most visited of Mexico. 

After this mystic experience of a couple of hours, the visit to Xel Ha eco-park will give you a complete vision of the richnesses essence that Mexico offers to those who visit this Mexican area, since it will get you closer to an encounter with native fauna and flora species, as well as natural environments of sea, cenotes, inlets, mangroves with their whole wild life among a rustic but comfortable atmosphere provided with all the services.  

In just one day you will live a magical approach with the ancient Mayan culture and with the splendidly preserved nature, whether you prefer to stay in Cancun or at any other point of the Riviera Maya. 

¿Did you come to Tulum or Xelha?  http://www.cancuntravel.com/tulum-xelha.asp#reserve

Tulum is located 82 miles south of Cancun. It has a great cultural importance and is the front door to the north coast Biosphere Reserve of Sian Ka’an. Is one of the most beautiful cities of the Mayan culture with the most spectacular view of the Mexican Caribbean.
Tulum o Tulu’um in Modern Maya or Tulúm in Spanish  is a Pre-Columbian Maya walled city serving as a major port for Cobá located at the east coast of the Yucatán Peninsula on the Caribbean Sea in the state of Quintana Roo, Mexico. One of the best-preserved coastal Maya sites.

The Maya site may have been formerly also known by the name Zama, meaning city of Dawn. Tulúm is also the Yucatec Mayan word for fence or wall, and the walls surrounding the site allowed the Tulum fort to serve as a defense against invasion. From the numerous depictions in murals and other works around the site, Tulum appears to have been an important site for the worship of the Diving or Descending God.

The archaeological site is relatively compact, and is one of the best-preserved coastal Maya sites. Its proximity to the Riviera Maya and Cancún has made it a popular destination for tourists the third most-visited archaeological site in Mexico, after Teotihuacan and Chichen Itza . This tourist destination is now divided into three main areas: the archaeological site, the pueblo (or town), and the zona hotelera (or hotel zone).

From CancunTravel.com, http://www.cancuntravel.com/itulum.asp, Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Tulum and Cancun Convention and Visitors Bureau  http://cancun.travel/en/experiences/mayan-culture/tulum/.