The sea-organ, or “morske orgulje” as it’s know in Croatian, was designed by Croatian architect Nikola Basic and opened to the public in 2005. Water and wind enter through holes at the bottom of the steps, where they are channeled into resonating chambers. The sounds from these chambers exit through holes along the highest steps.
The site is a popular lunch-spot for tourists and locals alike, but it wasn’t always this way. After being completely devastated during WWII, the reconstruction of Zadar left it full of ugly concrete constructions, and among these was a long concrete shoreline. I think we can all agree that this organ was a huge improvement! Scroll down to hear how it sounds!
More info: zadar.travel (h/t: upworthy)