When on foreign trips I spend a great deal of time tram-travelling. Other than those I "voted" for: Freiburg im Breisgau, Berlin, Munich, Augsburg, Rostock, Düsseldorf, Duisburg, Essen, Bochum/Gelsenkirchen, Dortmund, Neuss, Krefeld, Vienna, Santa Cruz de Tenerife, Lisbon. Munich three times...