Metru Nui

Metru Nui, the City of Legends, is the subterranean island where the Matoran evolved and inhabited until Makuta took over. It is found beneath Mata Nui, and is currently being restored. Metru Nui means "Great City" In matoran.

History
Metru Nui has a vast history, hence its nickname. Not much is known of it before Lhikan's Team came to island to defeat the Kanohi Dragon, or where they came from. But after the Toa arrived and sent the Dragon away, the Dark Hunters soon came in pursuit, and started a full-scale war on the island.

Two leaders successfully emerged. One, Dume, who led the Toa, and the Shadowed One, the leader of the Dark Hunters. After many clashes and a lot of sneaking around, Makuta defeated the Dark Hunters, then seemingly left, with his allies, including Roodaka, the Toa Hagah, and Sidorak.

Most of the Toa left, leaving Lhikan and his group to defend the city. Slowly over the centuries, many of his team, including Nidhiki and Krekka, disappeared, leaving the Toa of Fire at a lonely job. Meanwhile, Makuta, who was in fact evil, impersonated Turaga Dume, who was secretly employing Krekka and Nidhiki in his scheme.

The two Dark Hunters began to hunt down Lhikan, who was taking six Toa Stones to six Matoran, each from a different Metru: Vakama, Nokama, Matau, Nuju, Onewa, and Whenua. After he had given the last stone to Vakama and instructed them to take them to the Great Temple, he was seemingly killed by the evil duo.

Makuta, as soon as he recieved word of Lhikan's apparent death, unleashed the Morbuzahk on the city, as a way of driving the Matoran to the Coliseum. But the Toa Metru, the new Toa heroes, found six Matoran who knew the location of the Great Disks. With their aid, the Toa defeated the vile plant and Vakama succesfully forged a Mask of Time.

But their victory was short-lived, for Nidhiki and Krekka captured Nuju, Onewa, and Whenua, and locked them up in their Po-Metru prison, where the Toa found Lhikan, as a Turaga. After teaching them their mask powers, they were rescued, and the seven friends quickly went to the Coliseum, where they discovered Makuta was an evil being and he was going to make the Matoran do his bidding.

After the confrontation was done, the Toa took the Matoran they could to Mata Nui, and left the others there. Meanwhile, the Visorak came to Metru Nui, and covered it entirely in deadly webs. The Toa returned to save the Matoran, and, after quite a struggle, toppled Roodaka and set the Visorak free. The Rahaga andDume remained to fix the mess.

After Makuta was killed in Mata Nui, the Matoran will be returning to the City of Legends.

Location
Metru Nui's location has caused much debate. According to canon, Metru Nui is below Mata Nui in a Protodermis Sea. However, it also has two suns like Mata Nui, which must be artificial. However, this is never mentioned anywhere, and therefore must be some sort of real sun that actually exists outside the dome but shines through. Metru Nui also has moons, and is about 65 times smaller than Mata Nui.

Districts
Metru Nui is divided into seven districts:
 * Ta-Metru
 * Ga-Metru
 * Le-Metru
 * Ko-Metru
 * Po-Metru
 * Onu-Metru
 * The Coliseum