Lake Thalmiir was a subterranean lake in the Underdark.
A portal on the northwestern shore of Lake Thalmiir was "an easy walk" from Sschindylryn. The portal led to an ancient monastery elsewhere in the Underdark.
- ↑ 1.0 1.1 1.2 Philip Athans (August 2005). Annihilation. (Wizards of the Coast). ISBN 0-7869-3752-1.
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