Nar Kerymhoarth

Nar Kerymhoarth (the Sleeping Citadel) is an underground fortress known by most as the Nameless Dungeon. The Eaerlann knew its true name but refused to speak it. It is situated below a stone bluff in the High Forest and at its entrance is a nearly impenetrable magically protected stone door. The site is guarded against intrusion by elven patrols, who wear a diamond-shaped brooch.

History
On 16 Alturiak, 1374 DR, Sarya Dlardrageth used the complete Gatekeeper's Crystal to utterly dispel all of the magical protection and gained access. This freed the fey'ri imprisoned within for the past five thousand years, who numbered almost two thousand.