Siddim

All the latter kings joined forces in the Siddim Valley, where the Dead Sea is.

Then the kings of S'dom, 'Amora, Admah, Tzvoyim and Bela (that is, Tzo'ar) came out and arrayed themselves for battle in the Siddim Valley

Now the Siddim Valley was full of clay pits; and when the kings of S'dom and 'Amora fled, some fell into them; while the rest fled to the hills.