Sound on! The step pyramid Temple of Kukulcán at Chichén Itzá, Mexico, a 30m high structure built by the Pre-Columbian Maya civilisation sometime between the 8th – 12th century CE, demonstrates a peculiar acoustic phenomenon: clapping directly in front of it sends back an echo which sounds similar to the local quetzal bird, which was sacred to the Mayan people. Hear the temple's echo compared with the call of a quetzal bird in our video.
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