A keyboard that plays a cave

In Virginia’s Luray Caverns, the stalactites themselves make the music. Each keyboard key triggers an electric mallet with a rubber tip, which gently taps a selected, tuned stalactite and sends a note through the cavern. Leland Sprinkle began building the Great Stalacpipe Organ after visiting in 1954. He connected a keyboard to rock formations spread across the cave, so the music comes from the stone.

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