"There are too many in close proximity. Beings that aren't made to coexist with each other, forced to with not even death certain to provide an exit." It was no surprise to Castiel that this place was even more tumultuous and surprising at times than their own world. At least they were used to that.

He understood Dean's feelings; if there was somewhere he could hide, he would be tempted. Unfortunately moving across the island would get Dean nothing in the end.