Dear,
It 's believed all nature with secret magic or function can heal poeple. Strictly speaking, it is one kind of 巫術 or 迷惑. The nature can heal people's mind or body. Why cannot heal themselves? Nature still being destoryed by pollution?
God made every thing with their function such as Chineses herbs. But they are not God. Many people want earn more money so they 誇張 some stone, wood,......They are only as supplement to help people. Wave sound really can make people relax but cannot heal psychi illness.