Where was The Big Brawl filmed?
1980 film by Robert Clouse
The Big Brawl (1980) was filmed in San Antonio and Floresville, 2 places named in its Wikipedia article, in the United States. 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 2 places. Each links to the sentence that says so.