El Castillo: The Iconic Pyramid of Kukulcán at Chichén Itzá

As you step into Chichén Itzá, El Castillo—also known as the Pyramid of Kukulcán—stands majestically before you. The original pre-Toltec temple dates to around AD 800, but the current 25m-high structure, built atop it, showcases plumed serpents sculpted along the stairways and Toltec warriors carved above the doorway. Climbing is prohibited following a fatal accident in 2006, so the upper carvings remain out of view.

This architectural marvel functions as a massive stone Maya calendar. Each of its nine levels splits into two terraces via a central staircase, creating 18 sections that represent the Maya Vague Year's 18 twenty-day months. The four staircases feature 91 steps each; including the top platform, they total 365—matching the solar year. Each facade displays 52 panels, symbolizing the 52-year Maya calendar cycle.

At the spring and autumn equinoxes, sunlight and shadows cast triangular patterns down the north staircase, evoking a descending serpent—complemented by carved serpent heads at the base.

Within the older pyramid lies a red jaguar throne adorned with jade eyes and spots, alongside a chacmool sacrificial altar. The entrance to El Túnel, leading to the throne, is at the north base of El Castillo, though access is restricted.

Research in 2015 revealed that the pyramid likely sits above a 20m-deep cenote, heightening concerns about structural stability.