Davos, Switzerland
Riga, Latvia
Helsinki, Finland (seriously, how are you not 100% sure Helsinki is in Finland, it's the easiest one on the list, easier even than Cologne)
Stockholm and Vasteras, Sweden
Cologne, Germany
Bern, Switzerland
Bratislava, Slovakia
Oslo, Norway
Kolari, Finland (this is the only one I've had to look up)
Turku, Finland
And now, for something completely different:
Ouagadougou, Burkina Faso
Khartoum, Sudan
Bloemfontein, South Africa (as well as the more known three cities: Cape Town, Johannesburg, Pretoria)
Asuncion, Paraguay
Montevideo, Uruguay
Belmopan, Belize
Andorra La Vella, Andorra
Valletta, Malta
Windhoek, Namibia
Tashkent, Uzbekistan