Dunkirk filmed at IJsselmeer, Urk. An artificial freshwater lake in the Netherlands near Urk, chosen for open water and convincing horizons for controlled sinking scenes.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer. This is an area, not a spot. The coordinate is its middle, so use it to navigate to the place and not to line up a shot.
Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Urk and it tells you what was shot around you, how to get there, and whether you can actually go in.
Download Venture for iOS Android