The Mountain Stronghold was the fortress for the Voya Nui Resistance Team. According to the Matoran, it was built in the time before Voya Nui split off from the Southern Continent. It appeared on VNOG, on Inika Island Assault where Avak appeared as boss, and on Matoran Escape, where Thok was the chapter boss.

It was destroyed when Voya Nui returned to the Southern Continent.


Voya Nui
Fire Regions: Mt. ValmaiLake of LavaChamber of LifeLava Reservoirs
Water Regions: The Cape of No HopeLagoon EntranceMahri Nui (Formerly) • Voya Nui Bay
Village Regions: Matoran StrongholdMatoran VillageThe Jungle SanctuaryCanyon Fortress
Piraka Regions: Piraka StrongholdThe Chamber of TruthPiraka Outpost
Ignika Chambers: Staircase to the IgnikaThe Zone of NightmaresThe Chamber of DeathUmbra and Protodax's ChamberLava Chamber Gate
Other Regions: Ring of IceCavern of Historical RecordsDesert of SorrowsThe Green Belt
Lake of ProtodermisNui CavesStone Cord (Destroyed)