In this July 26, 2011 photo, Doyle Lawson, center, and Quicksilver perform in the Volcano Room at Cumberland Caverns, 333 feet below ground, in McMinnville, Tenn. The natural ampitheater is where the ... more 
In this July 26, 2011 photo, Doyle Lawson, center, and Quicksilver perform in the Volcano Room at Cumberland Caverns, 333 feet below ground, in McMinnville, Tenn. The natural ampitheater is where the Bluegrass Underground radio show is broadcast from once a month. (AP Photo/Mark Humphrey) less 
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Associated Press | Photo By Mark Humphrey
Tue, Nov 1, 2011 6:31 PM EDT