Blue Mountains Houses are structures that the Blue Mountains dwarves call their home. The outside is designed to look like a mountain to prevent unexpected visitors or attacks on their precious home. At the front of the house is a Dwarven door which is only detectable at night. You can also find the houses, if you hear someone eating or drinking, when nobody is close. Then it's probably a dwarf in his house. This particular Dwarf house spawns in the Blue Mountains biome, but it is akin to Dwarven houses which spawn in the Iron Hills biome, and house Dwarves from Durin's Folk.