[SunkenCiv]

Maya temple ruins in the Northern Group complex at Palenque, Mexico. [Photograph by Panoramic Images/National Geographic]

[razorback-bert]

I haven't decided which Mayan ruin I will visit when I visit Belize in February. It seems, they are finding them faster than I can visit.

[Leo Carpathian]

is especially good at projecting the human voice as well as sounds like those that would have been made by musical instruments found at the site...

geeeeze, some ignorant acoustic archeological "engineers"

like... what other sounds, or what different frequencies would there be? Suppressing low frequency Oooobama fart?

[Cvengr]

That's not a horn,...these are horns:

[seowulf]

Probably used it to project the screams of their human sacrifices as they cut their beating hearts out of their chests, so everybody could enjoy.

[Adder]

Horsecrap.

[JoeProBono]

[decimon]

They’ve described rock concerts.

[Waverunner]

So this is how they talked to the alien space ships from the future prior to the invention of tin foil.

[gleeaikin]

While reading the continuation of the article I found myself wondering about the labyrinth of Crete, and the paleolitic caves of France and Spain. One of the comments also raised the question of Crete, caves, and underground temples of Malta.