The underwater realm that inspired James Cameron's new 3D film Sanctum

Wes Skiles died during a dive last summer. Sanctum is dedicated to him.This is a real photograph from one of the most mysterious environments in the world.No, it's not a still from Sanctum - although James Cameron's new diving film was inspired by a near-catastrophic expedition by the man who took these pictures, Wes C Skiles.This is a real photograph from one of the most mysterious environments