Duisburg, North Rhine-Westphalia, Germany
Heerlen, Limburg, Netherlands
Bolnuevo, Murcia, Spain
Stuttgart, Baden-Württemberg, Germany
Munich, Bavaria, Germany
Fränkisch-Crumbach, Hesse, Germany
Hamburg, Hamburg, Germany
Frankfurt, Hesse, Germany
Urbach, Baden-Wuerttemberg, Germany
San Juan, Alicante, Spain
Switzerland