I have long been fascinated with Cymatics, or sound made visible.
Sound literally has geometry to it. You can see the visible geometrical vibrations of any given sound by placing sand or coated particles on to a metal plate, and then playing a frequency into the metal plate. The vibrations of the sound make the particles arrange themselves on the plate, sometimes in beautiful sacred geometric patterns and mandalas. – See more at: http://www.spiritscienceandmetaphysics.com/video-this-is-what-the-sound-om-looks-like/#sthash.dvu1VnpZ.dpuf