Check Out Chichen Itza
Ticked off in October 2009
What it is
Chichén Itzá was one of the largest Maya cities, dominated by the El Castillo pyramid.
How to do it
It's about two hours from Cancún or Mérida. Arrive at opening time to beat the tour groups, and swim in a nearby cenote afterwards.
Top tip
At the spring and autumn equinoxes, shadows form a serpent on the pyramid's steps.
My experience
Ticked off, but the full story is still to be written up.