A mystical well, located in Liping county, Guizhou province, has no water if its surroundings are quiet. However, pure and clean water will flow from the well when people shout into the hole.

According to a local legend, a dragon with ram’s horn lives in the well. People must pray for water with sincerity and express their wishes loudly to get clean drinking water from the mysterious dragon.

Through the analysis of modern science, the phenomenon is found to happen in karst landforms where underground water flows out because of sound resonance.