Nargothrond

In J. R. R. Tolkien's legendarium, Nargothrond (Sindarin portmanteau of Narog-Ost-Rond, "The great underground fortress on the river Narog"), called Nulukkhizdīn by the Dwarves, was the stronghold built by Finrod Felagund. The Realm of Nargothrond consisted of the underground city delved into the banks of the river Narog in Beleriand, and the lands to the north, the Talath Dirnen or Guarded Plain.