El Rey is extremely small. There are no large pyramids to be found and explored here, as there are at other ruin sites in Mexico, some of which are quite near Cancun. However, there are large platforms and also round columns that archeologists believe once held up large roofs. From this site, you can look down and see many of the large modern hotels that make up the Cancun hotel zone.

The ruins are open daily until 5 PM and the park rangers will let you feed the iguanas and will show you how to do so safely and comically. Be sure to bring bread or tortillas. The cost to get into the park is $3 in US dollars, and the bus ride to get there from any of the major hotels is less than a dollar, making this a very inexpensive adventure. Because of the hundreds of iguanas, this is an especially fun trip for families with small children, and it is a great way to wind down a day as you are heading back to your hotel.

If you want to see more of the Mayan ruins and explore a more historical site, your best bet is to take a day trip to Chichen Itza. This however, will be more expensive and you need to schedule a full day for visiting this location. El Rey is a very basic kind of ruin site, so if you don't have time to visit larger ruins, this is a good options so that you can see some of the ancient culture before you leave Cancun.