Where was The Colleen Bawn filmed?
1911 US short film directed by Sidney Olcott
The Colleen Bawn (1911) was filmed in Killarney, Killarney National Park, Beaufort and Gap of Dunloe, 4 places named in its Wikipedia article, in Ireland. 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.
Places per Wikipedia's article
The Wikipedia article names 4 places. Each links to the sentence that says so.

