Bustas&Dragons: The Lost Mine of Phandelver
The hideout for the Cragmaw Goblins, where their leader, Klarg (RIP), gave commands. After ambushing and capturing Gundren Rockseeker and Sildar Hallwinter, the goblins brought their prisoners back to their hideout. When the party arrived, only Sildar remained there. Gundren had been moved, by order of The Black Spider.