Essen, North Rhine-Westphalia, Germany
Mexico City, Mexico City, Mexico
Wageningen, Netherlands
Kleve, North Rhine-Westphalia, Germany
Luebeck, Schleswig-Holstein, Germany
Amsterdam, Noord-Holland, Netherlands
Duesseldorf, North Rhine-Westphalia, Germany
Buenos Aires, Buenos Aires City, Argentina
Villingen-Schwenningen, Baden-Württemberg, Germany
Münster, North Rhine-Westphalia, Germany
Hamburg, Hamburg, Germany