This should be somewhat chilling.
A part of the Lower Planes of Existence, a place of punishment, created by the sacrifice of thousands of children in the Valley of Gehinnom outside of Jerusalem, beginning some ten thousand years ago. As the children died upon burning pyres and began to enter the underworld, then no more than a place of dust, a shelf of icy rock was made manifest against the side of a mountain, amidst a great ocean, under an open sky, and there the dead children were left to wait, their feet frozen into a cake of ice that stretched out into the water. But this place had no name, not as yet.
Within the second millenia BC, the mountain above Gehenna began to ...