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- Ilmarin
- The halls on the summit of Taniquetil in the Pelóri mountains from which Manwë and Varda oversaw the goings on in Arda.
- Iron Mountains
- Also called the Ered Engrin, these were a range of immense mountains to the north of Middle-earth that were damaged and partially broken in the War of Wrath. Morgoth's fortress of Angband was located under Thangorodrim in the Iron Mountains.
Read more about this topic: Minor Places In Arda