Where was The Colbys filmed?
Television series
The Colbys (1985–) was filmed in Will Rogers State Historic Park, 1 place named in its Wikipedia article's Production and broadcast section, 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 Production and broadcast section
Wikipedia’s Production and broadcast section names 1 place. Each links to the sentence that says so.