The Sea Organ (morske orgulje) is is a natural musical instrument, seventy meters long with thirty-five organ pipes built under the concrete. The musical pipes are located so that the sea water and wind movements produce musical sounds that are heard by passers by so that it achieves a communication with nature and promotes a unity of architecture and environment. As sea forces and energies are unpredictable in terms of tides and winds, this organ offers never-ending concert of numerous musical variations in which the performer is nature itself. Listen