The Sword Coast Legends
Scarlet Moon Hall
Scarlet Moon Hall is located in the south-western section of the Sumber HIlls, and sits high atop a hill.
Little is knowing about Scarlet Moon Hall, though it is one of the Haunted Keeps, long since believed to be overrun by monsters. Though this was later revealed to be false, and a fire cult, known as the Cult of the Eternal Flame seems to have taken up residence here, covering the region in a heavy smoke.
The history of Scarlet Moon Hall is lost to time, though it likely served as some kind of watch tower at some point. Now, it is occupied by a dangerous fire cult, whom little is known about.