In 2005, architect Nikola Basic created the musical Sea Organ on the shores of Zadar, Croatia. It is the world's first musical pipe organ that is played by the sea. Simple and elegant steps, carved in white stone, were built on the quayside.
Underneath, there are 35 musically tuned tubes with whistle openings on the sidewalk. The movement of the sea pushes air through, and – depending on the size and velocity of the wave – musical chords are played. The waves create random harmonic sounds.