Where was Marco Polo (1982–) filmed?
1982 TV miniseries directed by Giuliano Montaldo
Marco Polo (1982–) was filmed in Himalayas and Malamocco, 2 places named in its Wikipedia article, in Nepal, Italy. 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.
Set in the same places
DuckTales: RemasteredAction game2013IGDB

