Ditch

The Ditch is a central geographical feature in the city of Sigil. It is a deep, wide ravine with a river running through the bottom. The river is typically referred to as, "the River" since it is the only river in the city.

No one knows where the water for the river comes from, but when it reaches the Edge (the gap along the inner side of the torus shaped city) the water flows off into empty space in a spectacular waterfall.

The Ditch is spanned by 3 major bridges, the Shattered Temple Bridge, the Ditch Bridge, and the Bridge of Martyrs.