A claustraphobic silence that some find unpleasant and others love.
What makes the echoing sound of these caves unusual, is the way the different chambers are connected together.
Legend has it that the funnel shape of this cavern allowed the whispers of prisioners be overheard.
There's crazy acoustics in this mausoleum: a whispering gallery and also an echo chamber..
http://www.sonicwonders.org/gol-gumbaz-mausoleum-bijapur-india/
The rich reverberant sound in the Baptistry of Pisa lasts an astonishingly long time, to the delight of all tourists, not just sound-ones.
Possibly the best and most famous concert hall for classical music.
A whispering gallery found in a surprising place, Grand Central Terminal in New York.
http://www.sonicwonders.org/whispering-walls-grand-central-station/
An amazing cacophony in the largest covered public square in Europe