The location in the picture would be on the far east side of the map, close to the terrorist spawn. I am assuming that all are familiar with this location (it's usually a major chokepoint).
Anyways, you keep going through the doorway and across the room with the crates. you get to the narrow lit hallway with some trash bags on the left side (right if you're SpecOps coming out) close to the wall. You can prone and hide in those trash bags, and people will barely see you (unless your gun or bodypart is sticking out). Very exploitable, good for SpecOps campers. Usually they'll walk right pass you without noticing you (of course you kill them before they do).
I am sorry that I do not have actually pictures of the exact location (this one I jacked off of don, sorry don.) I'll try to take some in game shots. In the meantime, I think most are familiar with this. Some of you might even have been killed by someone camping there before.
