Nidavellir

Nidavellir, "The Dark Fields," is the land of the dwarves in Norse mythology. The sometimes used word svartálfar refer to the same race as the dwarves, and consequently their realm is then known as Svartálfheim. It is identical to the underground of Midgard but separated from Helheim. Nidavellir is one of nine worlds in Norse cosmology.