When we look at something beautiful, be it a building or something found in nature we tend to only see the exterior. And yet it is the interior core that sustain and hold much of what we see and use.
A violin is an elegant instrument that produces beautiful music but when you see the inside of it, you find it is equally beautiful. Here are 22 things you probably have not seen their inner parts. #11 is just a terrifying sight of its potential.