[AGreatPer]

The ball field at Chichenitza, about an hour from Cancun, is acoustically outstanding. One person on one end can talk to a person at the other end in normal tone and hear them perfectly.

http://chichenitza-tour.com/

[razorback-bert]

Been there three times, once to see the serpent come down.
Need a fourth trip to see the Nunnery.