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At the spring and fall equinoxes, around March 20 and September 22, the sun casts a serpent of shadow down Chichen Itza’s Kukulcan pyramid.
Updated 2 min read

Chichen Itza is one of the most visited archaeological sites in Mexico today. This number dramatically increases in September, when thousands of tourists make their way to see a glimpse of the Chichen Itza Equinox. During the fall equinox, the sunlight is perfectly aligned to create shadows that resemble a snake descending the pyramid. And this is no accident; this phenomenon was purposefully designed by the Mayans thousands of years ago, showcasing their knowledge surrounding astronomy, architecture, and geometry. Also known as the “Descent of Kukulcan,” the fall equinox will happen between the 22nd and 23rd of September. Mark your calendars and let our team at Riviera Maya Haciendas introduce you to the fascinating history of this Mexico archaeological site.
The Chichen Itza Pyramid, also known as The Castle or Pyramid Kukulcan, was built between 800 and 900 CE. The building is 55 meters wide and 24 meters high. There are also 91 steps per side that function as a calendar representing every day of the year. The base of the north staircase includes two feather serpent heads placed as effigies to the God Kukulcan. It is in these stairways that seven reversed isosceles triangles create the shadow effect.
The story of Kukulcan began when the Toltecs invaded the Mayan Peninsula following their God, Quetzalcoatl. It wasn’t long before the Mayan people adopted their God and renamed him Kukulcan. To showcase the power of their God, the Toltecs gathered citizens throughout the peninsula to witness the descent of their God to Earth. Thousands of years later, Kukulcan continues to make his annual descent during the spring and fall equinoxes. This unique show will occur on the 22nd or 23rd of September at around 3:00 o’clock. After about an hour of descent, Kulkulcan will have arrived for another year.
In order to see the Chichen Itza Equinox for yourself, you will need to purchase admission tickets for the day of your visit. Enhance your experience with one of the guided tours where you can learn more about the fascinating history and Mayan life. If you want to explore the archaeological sites on your own, use the Chichen Itza self-guided walking tour available with Action Tour Guides.
In addition to the impressive Kukulcan Pyramid, you will also have access to several other heritage sites such as:
The Chichen Itza equinox is a bucket-list experience for anyone interested in history, astronomy, or architecture. Even if you can’t make it for the upcoming Equinox, we recommend marking your calendars so you can plan your vacation around this spectacular event in the future. Riviera Maya Haciendas offers beautiful vacation homes along the Riviera Maya from Cancun to Tulum. Discover your dream vacation today!
Where to stay
Four haciendas on the beach in Puerto Aventuras, about 1 hour from Cancun airport (1 hour 15 from Tulum’s), plus villas and condos along the Riviera Maya.
Four haciendas on one beach, and homes along the coast.
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