Towns & cities
Fjallabyggð
Municipality of Iceland
Wikipedia names Fjallabyggð as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.
1 place inside Fjallabyggð has a page of its own: listed below. Everything shot at it is already named above, recorded against Fjallabyggð as well.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Fjallabyggð. Each title’s page links to the sentence that says so.
Filming locations inside Fjallabyggð
1 place inside Fjallabyggð, with a page of its own. Every production shot at it is already listed above, because Wikidata records it against Fjallabyggð too.