Once Mayan people reigned over these lands, and today the only remnants of the ancient civilization are Mayan pyramids. These stone structures stand still from year to year, attracting hundreds of thousands of travelers who observe them from different angles, climb up, and take pictures. One of the oldest complexes of pyramids, that is included in the New7Wonders of the World, is Chichen Itza, located an hour drive from Cancun.
If you want to see something special, visit it during the spring or autumn equinox. At that time the sunlight and pyramid's structures create strange shadows that resemble the descending Mayan serpent Kukulcan. Whether this is a mere coincidence or it was put in that place on purpose—it's hard to say, but the effect is still awesome and inspiring today.