While they may not have the awe factor of Chichén Itzá, the El Rey Ruins have convenience on their side. Located in the heart of the Hotel Zone, these ruins are extremely accessible to visitors, and the site's small size makes it easy to see in a short time. Once a center for maritime trade, El Rey dates back to A.D. 1200. 

But for many past visitors, the ruins themselves were not the primary attraction: people flock to El Rey to mingle with the hundreds of iguanas that have invaded the former Mayan town, saying the iguanas make for some unforgettable photo ops.   

The El Rey Ruins are open for exploration between 8 a.m. and 4:30 p.m., and admission is 50 pesos (roughly $2.50). As is the case at Chichen Itza, there are guides available for hire if you'd like to learn more about the history of the archaeological site. You can reach the site via the R1 or R2 bus or rental car.