My dictionary gives 'echoing well' for a well into which you can speak/shout and hear your words echoed back.
But English dictionaries do not seem to know 'echoing well'. Is there a whole other word for this?
Hm, that's strange!
And 'echoing well' isn't correct either, then?
No-one else weighing in?
In Holland we also have these echoing wells in (older) amusement parks.
I almost can't believe they aren't known in England...!