Shadowmoon Burial Grounds

Shadowmoon Burial Grounds is a dungeon introduced in Warlords of Draenor, set in within Anguish Fortress. It features Ner'zhul as its end boss.

Following the defeat of the Dark Star, Ner'zhul and his followers retreated here.

Dungeon Journal
''The traditional burial grounds of the Shadowmoon clan are the final resting place for countless generations of ancestors. The fallen chieftain Ner'zhul, in the depths of his depravity, has sacrificed the very soul of his clan in a desperate quest for power. Now the ancestral spirits are restless, tormented and used to fuel dark rituals that will pull all of Draenor into the void if allowed to run their course.''

Dungeon denizens

 * Draenei
 * Orcs
 * Ghosts
 * Skeletal orcs

Encounters

 * Sadana Bloodfury
 * Nhallish
 * Bonemaw
 * Ner'zhul

Achievements

 * Shadowmoon Burial Grounds (achievement)
 * Heroic: Shadowmoon Burial Grounds
 * Heroic: Shadowmoon Burial Grounds Guild Run
 * Mythic: Shadowmoon Burial Grounds


 * Icky Ichors
 * Souls of the Lost
 * What's Your Sign?

Speculation
Given the presence of tree roots covering the Altar of Shadow in Shadowmoon Burial Grounds, and the fact you enter the instance from the east and then turn left (south) as you descend, it is possible that the Altar of Shadow is directly below Moonwillow Peak.