Quarry

The Quarry was an area of six statues that resembled the Toa Mata's masks. There was a Nui-Jaga nest nearby, and that was where Ahkmou got his infected comet balls. It was destroyed by Takua and Toa Pohatu.

The Po-Matoran built the Quarry inside a canyon formation in the Desert. It was here that the Po-Matoran mined for stone to be used for carvings.

The Quarry was cleared by the reawakened Bohrok swarms, and obliterated when Mata Nui was awakened.

In the Mata Nui online game, it doesn't matter which statue you place the key into, it will always lead into the Nui-Jaga's nest.