Where was Aadukalam filmed?
2011 Tamil film directed by Vetrimaaran
Aadukalam (2011) was filmed in Madurai and Thiruparankundram, 2 places named in its Wikipedia article's Filming section, in India. 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 Filming section
Wikipedia’s Filming section names 2 places. Each links to the sentence that says so.
