The organ utilizes 35 polyethylene pipes of different lengths, diameters, and tilts to produce seven chords in two musical keys.
The project was part of a larger initiative to reconstruct the Zadar waterfront, which had been destroyed during World War II.
Unlike traditional organs, the music is non-repeating and non-rhythmic, dictated entirely by the meteorological conditions and sea state.
The structure is designed so that the underwater channel openings are protected from heavy debris while allowing constant water flow.
The architect, Nikola Bašić, was a local Zadar native, which influenced the integration of the design into the city's maritime history.
The Sea Organ (Morske orgulje) is an experimental musical instrument that produces sound through the movement of sea waves against a set of 35 organ pipes installed beneath the Zadar waterfront. Designed by architect Nikola Bašić and opened in 2005, the structure consists of stone stairs descending into the Adriatic Sea. As waves push air through underwater channels, the organ generates randomized, harmonic tones that vary in frequency based on wave intensity. The site received the European Prize for Urban Public Space in 2006. It functions entirely through natural hydraulic and pneumatic power without external energy sources. The stone stairs are designed to serve as both an acoustic chamber and a public promenade. It is a central feature of the Zadar Riva, integrating modern engineering with the city's ancient coastal geography.
From the water's edge looking back toward the sunset with the silhouette of the stone stairs.
Visit during days with moderate waves; perfectly calm seas produce almost no sound.
Walk slowly along the entire length of the stairs to hear how different pipes produce varying pitches.
The marble steps can become very slippery when wet, so exercise caution when walking near the water's edge.
Do not expect a rhythmic melody or a formal concert; the sound is atmospheric, experimental, and dependent on chaotic wave movement.
Avoid jumping into the water directly from the organ pipes, as the area is designated for pedestrians and musical performance.
