Vaal Outpost is one of the city biomes of the Azurite Mine. It is a relatively rare biome, that has a chance of containing valuable rewards and boss fights, as the golden borders around the biome indicate.
This biome can contain any of the following nodes.
Biome Specific Nodes:
(in-game text in blue)
|Ruined Chamber||Contents unknown|
Contains an underground level: Vaal Ruined Chamber that contains several loot containers as well as waves of monsters
|The Grand Architect's Temple||Contents unknown|
Contains Ahuatotli, the Blind.