8,400 Visitors Witness Kukulcán’s Descent at Chichén Itzá Equinox

More than 8,400 people packed the ancient Maya city of Chichén Itzá on Friday for the spring equinox, watching one of the world’s most remarkable astronomical spectacles play out just as it has for centuries.

The star of the show: a shadow that resembles a serpent.

Between 4:30 and 5:10 p.m., the setting sun cast a series of seven triangular arcs of light and darkness along the alfarda — the sloping balustrade — of the north staircase of El Castillo, the site’s iconic stepped pyramid. For roughly 30 minutes, the effect creates the unmistakable illusion of a serpent’s body undulating downward toward the Cenote Sagrado below.

INAH — Mexico’s National Institute of Anthropology and History — described the phenomenon as “the descent of Kukulcán,” named for the feathered serpent deity central to ancient Maya cosmology. The institute noted that the effect is produced by the way the pyramid’s stone tiers interact with the angle of the late-afternoon sun twice a year, during both the spring and fall equinoxes.

Taquillas opened at 8 a.m. and ticket sales closed at 4 p.m., giving thousands of visitors time to settle in before the main event.

The turnout was a far cry from the tensions that have sometimes shadowed this site. For years, disputes over vendors inside the archaeological zone have been a flashpoint. In 2023, hundreds of artisans and merchants from nearby communities, including Pisté and Xcalacoop, blockaded access roads to Chichén Itzá for days, demanding the right to sell within the zone and calling for the removal of the site’s director. The standoff drew national attention and left thousands of tourists stranded. The vendors, most of them Maya descendants from adjacent towns, argue that their ancestral connection to the land gives them the right to work on the site — a claim that has long been at odds with INAH’s preservation mandate.

Friday’s event showed a different face of the place. INAH organized a series of educational activities for visitors ahead of the phenomenon and afterward encouraged both Mexican and foreign tourists to continue visiting the country’s archaeological sites, in accordance with the rules in place to protect them.

“In the western side of the alfarda of the north staircase of the building called El Castillo, the visual effect produced by the sections of the base formed seven arcs of shadow that, for some 30 minutes, give the appearance of the undulating body of a serpent descending and beginning its journey toward the Cenote Sagrado,” INAH’s Yucatán delegation said in a statement.

El Castillo — also known as the Temple of Kukulcán — is a Mesoamerican step pyramid rising some 30 meters (roughly 98 feet) above the surrounding plain. Each of its four sides has 91 steps; together with the top platform, they total 365 — one for each day of the solar year. The pyramid’s alignment to the sun is no accident. The ancient Maya were sophisticated astronomers who built the equinox illusion directly into the architecture.

Chichén Itzá is a UNESCO World Heritage site and consistently ranked as Mexico’s most-visited archaeological site, drawing more than 2 million people annually in recent years. In 2026, the general entrance fee for foreign visitors is approximately MX$697 (about US$40), a combination of federal and state fees collected separately at the gate.

The fall equinox, when the same serpent illusion repeats, is expected around Sept. 22.

Equinox at Chichén Itzá — Fast Facts

• The phenomenon occurs twice yearly: spring (around March 20-21) and fall (around Sept. 22) equinoxes
• The shadow effect is visible on the north staircase of El Castillo (Temple of Kukulcán) between roughly 4:30–5:10 p.m.
• The illusion lasts approximately 30 minutes
• The site opens at 8 a.m.; ticket sales end at 4 p.m. on equinox days
• Entrance fee: approximately MX$697 (about US$40) for foreign visitors in 2026 — two fees collected separately
• Chichén Itzá is located off Federal Highway 180 between Mérida and Cancún, near the town of Pisté
• Arrive early to avoid crowds; heat can be intense by midday