My wife and I snuck away from a frigid Boston January for a week in the Mayan Riviera. 85ºF every day was a very welcome change of pace. Between extended bouts of lying on the beach soaking up the sun, we went for a day excursion to Chichén Itzá.
This is our third Mayan ruin complex we have visited, after the Tikal and Yaxhá complexes in Guatemala. Chichén Itzá is a bit later in the timeline of Mayan culture compared to the the other sites, and the architecture is noticeably slightly different. Mostly this is reflected in the geometry of the pyramids and the increased presence of skull carvings that have been preserved. It was also very crowded. We went in the morning, and if that is an option, I recommend pursuing it. As we were leaving, bus load after bus load of additional tourists were arriving.