The Sea organ is an architectural object located in Zadar, Croatia and an experimental musical instrument which plays music by way of sea waves and tubes located underneath a set of large marble steps. The waves create somewhat random but harmonic sounds. The device was made by the architect Nikola Bašic as part of the project to redesign the new city coast (Nova riva), and the site was opened to the public on 15 April 2005. (source: Wikipedia)
This ist a heavy frequented geocache, so a lot of things can happen. If something is wrong with it, feel free to fix the problem. The box is an ordinary film container, the logbook should have enough space for many entries. Thank you in advance.