It comes in real good 3D quality. You can tell that James Cameron made it.
The movie is about an underwater cave diving team experiencing a life-threatening crisis during an expedition to the unexplored and least accessible cave system in the world.
In this case is the Esa'ala Cave in Papua New Guinea.
The view was simply amazing! Watch it to actually 'see' it.
After watching it, you might come up with this:
Post-Sanctum syndrome: "Cave-diving anyone?"