The following is the results of your search for siddim, vale of.
Siddim, Vale of: Valley of the broad plains, "which is the salt sea"
between Engedi and the cities of the plain, at the south end of the
Dead Sea. It was "full of slime-pits" (R.V., "bitumen pits"). Here
Chedorlaomer and the confederate kings overthrew the kings of Sodom
and the cities of the plain. God afterwards, on account of their
wickedness, "overthrew those cities, and all the plain, and all the
inhabitants of the cities;" and the smoke of their destruction "went
up as the smoke of a furnace"
(Genesis 19:24-28) and was visible from
Mamre, where Abraham dwelt. Some, however, contend that the "cities of
the plain" were somewhere at the north of the Dead Sea.