"Some here will remember that many years ago I myself dared to pass the doors of the Necromancer in Dol Guldur, and secretly explored his ways."

Work on the Dol Guldur fortress map has begun. Some of these ruins were created by Irenë Hawnetyne, you can see the originals here: Moddb.com

The other props were created by Matt Alexi and Mathijs.