Y'ha-nthlei is a fictional city created by H. P. Lovecraft for his novella The Shadow Over Innsmouth.
Overview[]
Y'ha-nthlei is one of the Undersea cities populated by the Deep Ones. The hybrid denizens of Innsmouth are known to migrate there after their transformation is complete.
The city is a cyclopean hub of unearthly and terrible beauty, with many columns and palaces with hundreds of terraces filled with corals and phosphorescent brachiates. The city is located near Devil Reef, off the coast of Innsmouth. Its location was revealed to the United States government by Robert Olmstead in the 1920s and the city was attacked by submarines and partially destroyed, but not completely.