A dock at the San Francisco Bay marina and The Wave Organ.
Last week I visited San Francisco for a company engineering meet up. I brought along a small recording kit, and while I didn't collect as much sound as I hoped, I did manage to make it to The Wave Organ.
The first recording—captured with contact microphones—is one of the docks you encounter while walking to the Organ.
The second recording captures two pipes of the Organ and how they interact as waves hit the jetty.
https://www.exploratorium.edu/visit/wave-organ