Technically it's the world's longest reverberation, not echo.
It's in an unused underground fuel oil storage tank, skip ahead to about 1:30 if you're not interested in a brief history of the place itself.
View: https://www.youtube.com/watch?v=lLUcOFwZvyY
Anyone who suffers from claustrophobia may not want to see how he gets in and out of it!
It's in an unused underground fuel oil storage tank, skip ahead to about 1:30 if you're not interested in a brief history of the place itself.
View: https://www.youtube.com/watch?v=lLUcOFwZvyY
Anyone who suffers from claustrophobia may not want to see how he gets in and out of it!