LoTR: A Bad Place to Dig Too Greedily and Too Deep – The Khazad

The mines of Moria are a dark and dusty place, but the city that came before it? Khazad-dûm was the greatest of the Dwarf cities.

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LoTR: A Bad Place to Dig Too Greedily and Too Deep – The Khazad-dûm Breakdown - Bell of Lost Souls

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What are the “nameless things” underground that made the tunnels below Khazad Dum? - Quora