Lake Thalmiir was a subterranean lake in the Underdark.[1]


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]



  1. 1.0 1.1 1.2 Philip Athans (August 2005). Annihilation. (Wizards of the Coast). ISBN 0-7869-3752-1.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.