Use {{location|FI}} to tag expeditions that took place in Finland. It will add Category:Meetup in Finland to the expedition.
Using ISO 3166-2 abbreviations, you may also tag the region (maakunta) that the expedition took place in. For Åland, use {{location|AX}} instead.
If the category link appears red, do not worry and create the category. Make sure that it is included in the appropriate parent category, for instance, Category:Meetup in Keski-Pohjanmaa is a subcategory of Category:Meetup in Finland. The subcategories should be sorted in by their respective code.
Examples
{{location|FI}}: Finland{{location|FI|07}}: Keski-Pohjanmaa
