Tulum is the site of a Pre-Columbian Maya walled city serving as a major port for Cobá. The ruins are located on 12-metre (39 ft) cliffs, along the E coast of the Yucatán Peninsula on the Caribbean Sea in the state of Quintana Roo, Mexico. One of the best-preserved coastal Maya sites, Tulum is today a popular site for tourists.
It is best to stay overnight and visit the ruins early in the morning before the buses arrive, or later in the afternoon. Morning is recommended since you can catch spectacular vistas when the sun is rising over the Caribbean.