Where was Maladolescenza filmed?
1977 film by Pier Giuseppe Murgia
Wikidata records no filming location for Maladolescenza (1977) 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 Carinthia, Upper Austria, without naming a place, so it is not on the map.
Filming locations that are mapped there: Austria