City
Tulum
(sometimes called Tuluum) is the site of a Pre-Columbian, Mayan walled city serving as a major port for Cobá . The ruins are located on the east coast of the Yucatán peninsula on the Gulf of Mexico in the state of Quintana Roo, Mexico.
The Maya site may have been formerly also known by the name Zama, or the city of Dawn. Tulum is also the Mayan word for fence,trench or wall and the walls surrounding the site allowed Tulum fort to serve as a defense against an 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 Descending God.
http://en.wikipedia.org/wiki/Tulum