In the northwest corner of the domain a vast section of Hell's Traverse has collapsed, revealing an opening to an adjacent hell. This opening was originally created when residents of the Hell of Infernal Machines, who had discovered tunnels connecting the two rounds, packed these tunnels with infernal blasting powder and blew the entire wall face.
The breach is a mile long, the area around for three miles in any direction is littered with huge rocks, boulders and detrius from the blast.
If one travels into the breach, after an extremely rough six mile journey, you emerge in an entirely different realm, the Hell of Infernal Machines.