Among the loose unity of planewalkers, we conceive of the infinite Outer Planes as a ring surrounding the plane of ultimate neutrality - the Outlands. The spire atop which Sigil sits is in the center of the Outlands. The further one travels away from the Spire, the less neutral the plane grows, until it spills into the neighboring planes. Each of these planes impinges on the Outlands, spinning themselves into law and chaos, good and evil. The Great Road marks the demarcation between the Outlands and the gate-towns that spring up around the gates to these planes. Beyond the gate towns lie the Hinterlands, uncharted territory that is lost to history, that loses thought. Danger lies in the Hinterlands.