I had seen this organ pictured once in The American Organist a couple of years back. Last night's browsing of YouTube reminded me of it. The YouTube clip you're about to see is the IV/73 Austin pipe organ (for those who aren't organists, "IV/73" is a shortcut for saying "four manuals (keyboards) and 73 ranks (sets) of pipes") at the Spreckels Organ Pavilion in San Diego, CA. It is the largest outdoor organ in the world (pray it doesn't rain on concert day, hey?).