...how about a semi-submerged pipe organ?
A dear friend, Reine, collects Second Life musical instruments, including really gorgeous stringed instruments like oud, pipa, vihuela de mano, lute, theorbo, and the like. (Drums, too; she has a sweet tabla.) But I'd never have expected this...
So for a while I took pictures with various Windlight settings while she played gorgeous baroque organ music partially underwater at the beach on Crete. Great fun!
UPDATE: Oops! Reine properly corrects me in the comments; she has an archlute, not a theorbo.
UPDATE: Nae, Reine may well have told my absent-minded self where she got the pipe organ, but I don't remember. Peeking at SL Marketplace turns up a fair number of pipe organs. Help, please? [tries for the big puppy dog eyes look]