The Poison Sea was an aquifer located beneath the Howling Mountains in Relmaur, Laerakond.
A tribe of genasi known as the Saqr lived on an island made of crystal located in the center of the aquifer.
- ↑ 1.0 1.1 Bruce R. Cordell, Ed Greenwood, Chris Sims (August 2008). Forgotten Realms Campaign Guide. (Wizards of the Coast), p. 211. ISBN 978-0-7869-4924-3.