Swamp of Secrets

From Lego Bionicle

The Swamp of Secrets was a swamp at the floor of Karda Nui. It's features included loads of mist. It was formed 1,000 years ago when Voya Nui split off from the Southern Continent and the sea water from the surface flowed in as a waterfall, but it was eventually exhausted by the actions of Matoro. It was home to a host of different Rahi. The swamp was destroyed after the Energy Storms ravaged Karda Nui once again. The Makuta Mistaka assigned there were Krika ,Gorast ,and Bitil. Half of the Toa Nuva went to the swamp: Tahu, Gali and Onua.