That’s not a real place like Caddo Lake, which really looks more like a collection of swamp and woods on the border between Texas and Louisiana. Writing/directing duo Logan George & Celine Held (who worked on three episodes of “Servant,” which likely led to M. Night Shyamalan producing this flick) were reportedly inspired by the real Caddo Lake, a place that has a dangerous energy that ties it back through generations of locals. They have imagined a story of three lost people in this deadly place that are tied in ways they could never imagine, and, again, I can’t spoil.