I stumbled across this project recently and was really taken with its ingenuity:
Sea Organ is an architectural and experimental musical object located in Zadar, Croatia. Is a pipe organ that has a set of 35 musically tuned tubes located underneath a set of large marble steps played by the sea waves. The movement of the sea pushes air through, and depending on the size and force of the wave, it produces a somewhat random but harmonic sound. Designed by architect Nikola Basic in 2005, who recently received the European Prize for Urban Public Space for this project.
What do you think? Would this work in Seattle?