Oil storage tank
https://www.youtube.com/watch?v=VZwVl4Fvl1k
 
World's biggest spring reverb
https://www.youtube.com/watch?v=-6J0hacr1WU
 
Sea cave in Iceland
https://www.youtube.com/watch?v=ozOjmaeQmTo
 
more oil tanks, multiple passes
https://www.youtube.com/watch?v=tpPKQ7eBiI8
 
National Physical Laboratory UK
https://www.youtube.com/watch?v=cYMQme4quOE
 
 
 
 
 
 

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A repast-participle of a renoun reverb? 
(Just thought I'd regerund that.)

James Taylor's shipping crate reverb.
Here is something that most of us would probably love to build:
 
http://www.slate.com/articles/video/video/2016/02/james_taylor_explains_why_his_shipping_container_is_really_an_echo_chamber.html