LOL - there are a fair number of Mayan ruins in the area - the best known are:
Chichen Itza, the largest of all of them, but it is the furthest away and leaving from either of the Desire properties or TTR will take you one whole day (ie leave at 8am and back by 6 -7pm) - also the most expensive of the choices
Tulum is the closest of all the choices to either of the Desire properties or TTR and second in size to Chichen Itza - you can easily do it in half a day or combine it with another tour (ie Coba, XEL-HA, etc
Coba is smaller than Tulum and a bit further away you can easily do it in a morning or combine it with another tour (ie Tulum, XEL-HA, etc
Here is a link where you can book any of these tours using the same company that the forum supports for your transfers - further info on all the locations is available thru the link below
Book Mayan Ruins Tours