The Voya Nui Bay was the bay that Voya Nui's landmass encircled. The bay used to be filled in with land created by a volcano, upon which the Matoran city of Mahri Nui was built. However, Mahri Nui eventually broke off and sank, taking its inhabitants with it. Afterwards, the Matoran still on Voya Nui threw flowers, gifts and supplies into the bay as a tribute to their deceased friends, not knowing that they were actually still alive.

It no longer exists after Voya Nui slammed into 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)