Well...as the topic say...

I am exploring the temple of Death and i can't find a way to remove the big stonehead at the 2.bridge.
At the Map you can see a way leading towards NW behind the head but i didn't find a way to reach this area.

Has anyone a idea how to reach the area?

I doubt there is. There have been several topics on Larian's forums, but no one has found a way in.
It is probably not accessible. Maybe it will be at a later date, through an add-on? Or maybe it's just there to give players the illusion that this temple is a lot larger.

At any rate, I wouldn't waste time trying to get in. Many before have tried. :)

The hope died last :)...

But still...that no one found a way in..doesn't mean that there is no way ;)

Actually, a while ago someone managed to teleport in and made screenshots. It's a dead end, there's nothing there.