There's a sea organ in Zadar, Croatia, that produces random musical effects, created by the energy of the winds and the sea, in an ever changing symphony. The organ was designed by Croatian architect Nikola Basic and opened to the public in 2005. This stretch of the Adriatic coast was heavily bombed during WW2 and reconstructed in ugly, boring concrete after the war, but the 230ft organ turned it into a very popular spot with both locals and tourists.