Everyone obsesses over Chichen Itza and Tulum but there's a fascinating Mayan site right in the Hotel Zone. El Rey ruins are historically significant as a trading post between inland cities and coastal settlements.

The site dates from 900-1500 CE with clear architectural evolution over that period. Main temple shows influence from both Mayapan and coastal styles.

Entry only 65 pesos, never crowded, walkable from most Hotel Zone hotels. Perfect cultural fix without 2-hour bus rides to major sites. The iguanas sunbathing on ruins are an added bonus.