Ringing Rocks
The "ringing rock" phenomenon can only be found in a number of places around the world. One of the most famous areas of ringing rocks is in Pennsylvania. These rocks send off a high-pitched chime whenever they're hit with an object, such as a hammer or even a drum stick. This is a natural phenomenon that is randomly occurring.
Comparing all of the ringing rock parks around the world, there's no rhyme or reason as to why they exist where they do. There's nothing special about the area to make these rocks sing. It's simply a natural wonder!