Wind and wave music, Croatia

What looks simply like a series of concrete steps descending into the Adriatic Sea at Zadar, Croatia, is actually a pipe organ that is played by the waves and wind. Located in the city’s Riva section, along Istarska Obala street, the 230-foot-long Sea Organ (morske orgulje) incorporates seven groups of five polyurethane pipes tuned to two chords and opening onto the sidewalk. There is no cost to visit.