The Bog of Mourning is a location in Classic II: Dominique's Curse. It is the lower of two neighboring swamp areas, located between the town of Theurgia to the left and the Stygian Marsh to the right.
Like in the Stygian Marsh, falling into the water here will not instantly kill Dominique, but it will poison her temporarily. During the New Moon, the enemies here include Simians, slow-moving Mortes, Scythe Mites, and a Cannon Morte. The Dead Moon removes the Simians but adds Bone Mortes and more Scythe Mites. The area also features a wall that can be broken with the Block Breaker to reveal a chest that contains a Horus Eye.