The infamous Krishnar Pass, built by the dwarves before the other races were created, is home to Krishnar Pass Keep. The Keep featured heavily in both the Elven Rebellion and the more recent Ascension wars, with whoever controlled the keep ultimately carrying the war as well. The keep is known to have been conquered only once, by Diamitriis near the end of the Elven Rebellion, and is otherwise considered to be impenetrable.
Diamitriis was slain in battle taking the keep, and his final resting place is somewhere along the Krishnar Pass. The party believes they have narrowed the possible locations down to a 4 mile stretch.