Justice League filmed at Skrunda-1, Skrunda. This abandoned Soviet-era military town near Riga was photographed and scanned, then recreated digitally for the film. On screen it's Northern Russia town.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer.
Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Skrunda and it tells you what was shot around you, how to get there, and whether you can actually go in.
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