Chichen Itza Chirp: clapping at base of an ancient pyramid echoes the call of a sacred bird

Chichen Itza, a pre-Colombian archaeological site built by the Mayans in northern Yucatan, Mexico, is home to many architectural and cultural wonders, and one of this has baffled acoustics experts for decades. The Temple of Kukulkan is one of the most visually-striking structures at Chichen Itza, but perhaps its most intriguing characteristic is acoustic. The reason? Clapping at the base of the Mayan pyramid causes an echo that resembles a bird’s chirp. Do it repeatedly, or in a group, and the echos will sound like a chorus of ghostly chirps…

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