We hiked high on the mountainside to a place called Emerald pools. It was absolutely beautiful. But then about twelve young adults arrived and began climbing the rocks. Worse yet, we could hear every word they said because the surrounding cliffs created a natural amphitheater. Unknown to us, the kids were a traveling choir. Suddenly one of them began to sing and the others joined in. For the next half hour, we were treated to the most wondrous concert we have ever heard. Zion NP, Utah.