The Great Mine was a large cavern opposite the Le-Koro and Ta-Koro highways. It was the greatest of the Onu-Matoran mines and a work place for many Onu-Matoran, including Mamru, Taipu and an Onu-Matoran prospecter wearing a noble Matatu, named Azibo.

When Takua came here, they found a sundial that led to a room that had a golden mask. It was revealed later to be an entrance to Mangaia.

The Great Mine was flooded when the Gahlok invaded Onu-Koro. The flooding had a large economic effect on Onu-Koro. The Great Mine was later abandoned once the Matoran returned to Metru Nui. The Bohrok later destroyed it when they cleansed the island.

Onu-Wahi (v|e)
Papa Nihu ReefOnu-Koro HighwayGreat MineCavern of LightOnu-Koro Kolhii StadiumWhenua's Hut
Nuparu's HutOnepu's HutUssal StablesZemya's ShopTemple of Prosperity
Mata Nui (v|e)
Ta-Wahi (Ta-Koro) • Ga-Wahi (Ga-Koro) • Le-Wahi (Le-Koro) • Po-Wahi (Po-Koro) • Onu-Wahi (Onu-Koro) • Ko-Wahi (Ko-Koro) • Kini-Nui

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