Where was Tamizh Selvan filmed?
1996 Tamil film directed by Bharathiraja
Tamizh Selvan (1996) was filmed in Shivanasamudra Falls and Kollegal, 2 places named in its Wikipedia article's Production 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 Production section
Wikipedia’s Production section names 2 places. Each links to the sentence that says so.

