The Tren Krom Peninsula had next to no vegetation, and had a landscape similar to that of Voya Nui: A rocky landscape only a Rahi mountain goat could love. There is also a De-Matoran Village called De-Koro. There are also several acid falls and volcanos here, as well as cliffs lined with Razor Crystals.
There were several villages of Matoran living on this portion of the continent, including members of the Ko-Matoran, Ta-Matoran, and De-Matoran tribes. The Matoran there were said to live under the tyrannical rule of Makuta Gorast, constantly trying to not attract her attention and face her wrath. Because of this, they were very eager to leave if the opportunity presented itself, which is why many of the volunteers for Mutran's Matoran experiments came from there.
The region was where some of the creations of the entity Tren Krom took residence. They were considered very fearsome and they battled Makuta Gorast some time in the past. It is unknown if they are still around.