Warsaw, Mazovia, Poland
Wauwil, Luzern, Switzerland
Bucharest, Bucharest, Romania
Marienheide, North Rhine-Westphalia, Germany
Groningen, Groningen, Netherlands
Terrassa, Catalonia, Spain
Boston, MA, USA
Vienna, Vienna, Austria
Lisbon, Lisbon, Portugal
Sao Jose dos Campos, Sao Paulo, Brazil
Saint Petersburg, Saint Petersburg, Russia