Those who come across the wetlands of the bogs would be justified in thinking that it was any other swamp. But the dark waters hide a darker secret.
The floor of the bog is a congealed mess of dead vegetation and drowned corpses. It is sturdy enough to support structures, but shifts around with no provocation. You could find yourself stuck in a hole created by the movement of the bogs and your body added onto the decaying waste that lies just beneath the surface.
To survive in the Swallowing Bogs, settlers must learn to adapt around the ever shifting floor. Some build communities of rafts that sit above the surface, safe from the movements below. Others build structures off of the semi-permanent trees or on stilts.
Beneath the false ground lies a massive lake hidden from the sun. Aquatic beasts roam the waters, sensing the tremors caused by movement above. When the time is right, they latch onto their prey and pull them beneath the waters, never to be seen again.