The World’s Biggest Man-Made Calendar: El Castillo At Chichén Itzá – Reprise
Contemplating the 30-meter-high ancient pyramid at Mayan archaeological site Chichén Itzá in the blazing Yucatán sunlight, Elizabeth Doerr was awestruck by the structure’s complexity. Not just because of the pure historical ramifications of the pyramid and temple known as El Castillo, but also because of its timekeeping capabilities. Yes, you read that right: timekeeping capabilities!