The Wave Organ is located on a jetty that forms the small Boat Harbor in the Marina district of San Francisco, walking distance from the Exploratorium. The jetty itself was constructed with material taken from a demolished cemetery, providing a wonderful assortment of carved granite and marble, which was used in the construction of this piece. The installation includes 25 organ pipes made of PVC and concrete located at various elevations within the site, allowing for the rise and fall of the tides. Sound is created by the impact of waves against the pipe ends and the subsequent movement of the water in and out of the pipes. The sound heard at the site is subtle, requiring visitors to become sensitized to its music, and at the same time to the music of the environment. The Wave Organ sounds best at high tide.”