A most interesting instrument hides inside a fountain at Tivoli in the gardens of the Villa D'Este. Currently suffering loss of wind, power and tuning https://www.youtube.com/watch?v=13ndbbWRR40 it should majestically sound https://www.youtube.com/watch?v=gGJumf6m44M above the water although I wonder if some ranks of upperwork have been removed?
Best wishes
David P