Where was The Drum filmed?

1938 film by Zoltan Korda

The Drum (1938) was filmed in Chitral, Harlech, Denham Film Studios and Rhinog Fawr, 4 places named in its Wikipedia article, in the United Kingdom, Pakistan. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data

Places per Wikipedia's article

The Wikipedia article names 4 places. Each links to the sentence that says so.