Originally Posted by dioxide45

Depending on what time your flight is, the day may be a wash anyway. I don't know if you are renting a car or using one of the transportation services to get to the Marriott? If you are using transportation, they will likely want to be picking you up about 3 hours in advance of your flights. The drive to the airport isn't very log, but they don't want to be responsible for your missed flights.

We had a great day trip to Tulum also. We took the ADO Bus to the Tulum ruins and then a cab to a beach club on the Tulum coast. The beach clubs there are fantastic. Take a look at this post over in the TUG forums where I documented our day there.