A far less traveled path in the Marina is directly east of the St. Francis Yacht Club parking lot. Perfectly flat, it ends up a couple of hundreds later at the harbor entrance. There, wizards from the Exploratorium have set up a device that captures the underwater music of the waves. It is called the Wave Organ. Don’t expect J.S. Bach. It’s mostly whooshes, popping and glubbglubbing. If you’re not musical, you’ll enjoy the view from seating devised with remnants of 19th century tombstones.