Located directly north of the mountain island and the Quarantine Enforcement Platform, the mountains biome is potentially the most dangerous biome in the crater of 4546B. The jagged terrain and deep water already make exploration of this biome perilous. However, the 7 reaper leviathans which inhabit the biome make exploration almost impossible without the best equipment. This base provides a unique location to observe the little-understood leviathans as well as a convenient mining outpost.