The Ruinas el Rey — also called Ruinas del Rey — on the Mexican island of Cancun is one of several ancient Mayan sites in Mexico. It is located near the southern end of the island, just across from the Playa Delfines, nestled among mangroves. The site was first seen by Europeans in the 16th century. It was re-discovered in 1842, and excavated in 1954. The park in which the ruins lie is easily accessible by bus, and is open from 8:00 a.m. to 5:00 p.m.
Archaeologists believe el Ray was inhabited from about the tenth century until 1550 AD when the Spanish Conquest brought its functions to an end. It is thought to have been an astronomical observation post, but it might also be the burial ground of a king. Skeletal remains have been found there, as well as a ceremonial mask and a sculpture of a Mayan nobleman. Its Mayan name has been lost, but the Spanish name, el Rey, means "the king". There are 47 Mayan structures on the site, most of them minor in structure and probably purpose. There are two main plazas flanked by two main streets. This is unusual because most Mayan ruins have only one main street. There is also a small pyramid with a vault at the top. The interior fresco paintings have been fairly well preserved.
The Maya inhabitants are long gone, and the main residents of Ruinas del Rey now are iguanas. They bask on the walls and stones in the sun, and are not timid around people. The guides feed them, so the big lizards see humans as the source of a handout. There are also a few peacocks on the grounds. Ruinas el Rey is a great introduction to the world of the Mayas.