it's a gigantic sculpture installation, that it placed on a windy mountaintop, and is a series of tiered silver tubes that are all tuned, so when the wind comes through it it moans/sings this low, haunting song... it's AMAZING.

you can read an article about it here (Burnley Borough Council - Singing Ringing Tree launch)

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i really need to go there. asap.

Wow such a good idea
I bet that place would be scary in the dark though, creepy wind noises

Wow,thats great!I`ll make the effort to go and see it.

That is amazing! Practical sculpture.