Ringing Rocks State Park in Pennsylvania. Field of diabase boulders formed by thousands of years of frost-wedging. Some of the rocks, the "live"ones, actually ring when struck. It is a mystery why some ring and some don't and an even bigger mystery why they ring at all. Many attribute it so something supernatural or energetic. Many people travel there with hammers to make music in the mysteriously lifeless field. Talk about a rock concert.
Ringing Rocks Park, Bucks County, Pennsylvania