Where was Christopher Columbus filmed?
1985 miniseries by Alberto Lattuada
Wikidata records no filming location for Christopher Columbus (1985–) at all, not a place, not even a country. There is nothing to pin, and this page says so rather than guessing.
Why there is no pin
Its Wikipedia article also says it was filmed in Dominican Republic, without naming a place, so it is not on the map.
Filming locations that are mapped there: Dominican Republic