The bird-call effect, which resembles the warble of the quetzal bird, a sacred animal in Mayan culture, was first recognized by California-based acoustic engineer David Lubman in 1998. The 'chirp' can be triggered by a handclap made at the base of the staircase. | Historicalindigenoussites

When you clap your hands in front of the Chichen Itza stairs, the echo sounds like a quetzal bird, a bird native to South America. | Historyfeels

When you clap your hands in front of Chichen Itza stairs, the echo sounds like a Quetzal bird #chichenitza #pyramid #kukulkan #maya #ancientmystery #ancient #quetzal #historicalsites | History Piece