One of the New Seven Wonders of the World, Chichén Itzá is the most visited archaeological site in Mexico. The iconic pyramid of Kukulcán dominates the landscape, a masterpiece of Mayan astronomy and engineering.

During the spring and autumn equinoxes, shadows create the illusion of a serpent descending the pyramid’s staircase — a testament to the Maya’s astronomical precision.

Pro tip: Arrive right when gates open at 8 AM. By 10 AM, tour buses from Cancún flood the site. Bring water and sunscreen — there’s very little shade.