The Mountains of the North are a mountainous location in the north of the island kingdom of Kells where the Ice Cell cave is located. Inside the cell is the Mystic Armor of Fire, guarded by the Ice Lord.
When the Mystic Knights sought out their Mystic Armor, they traveled to the north and located the Ice Cell cave where Rohan's armor was located. Rohan traveled the rest of the way alone to earn his armor against the Sentinel that guarded it. During this time, Queen Maeve summoned a Juggernaut to face the other Knights, but failed when Rohan obtained his armor from defeating the Ice Lord.