The Sea Organ is a unique musical instrument located in the city of Zadar, Croatia. Designed by architect Nikola Bašić, it was completed in 2005 and is built into the steps along the waterfront. The organ uses the movement of the sea waves to create sound, as water flows through a series of pipes, producing harmonious tones. Visitors can sit on the steps and listen to the soothing melodies generated by the waves. The Sea Organ is not only an artistic installation but also a popular tourist attraction, blending nature and music in a captivating way.