Kowa Mountains

The Kowa Mountains is the biggest group of mountains in Bio-Land. It's mostly just mountains made of rock and stone and few can live there. The only known Matoran to currently live there is the Guardian of the Kowa Mountains. Kowa Mountains aren't dangerous though, if you watch your step and don't fall into the gorges below. It's actually a very good hiding place nd that's why many villains have had their Fortresses there, including for excample Tonga.