Where was Gallowwalkers filmed?
2012 film directed by Andrew Goth
Wikidata records no filming location for Gallowwalkers (2012) 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 Namibia, without naming a place, so it is not on the map.
Filming locations that are mapped there: Namibia