Dongbuknodae (동북노대), the northeastern crossbow tower, is a raised structure that was used by archers with crossbows to attack approaching enemies from all directions.
The semi circular shaped structure faces the northeast and is guarded with parapet, or extended defensive wall. Its location allows for a full view of the surrounding area.
There are two crossbow towers at the fortress. The other is Seonodae (Western Crossbow Tower).