The Biggest Secret Rock Concert [pics] www.environmentalgraffiti.com — Deep within the underground labyrinth of the Luray Caverns, Virginia, USA is what is likely to be the worldâs largest and awe inspiring musical instrument, The Great Stalactite Organ. Each of the selected stalactites was then wired a mallet, creating manual control solenoids, activated by the appropriate organ key on the console.More... (Music) |