Since I obviously haven't covered the entire area of every country I've visited, he's a more detailed list.
California, Oregon, Wyoming, Utah, Missouri, Louisiana, Florida, North Carolina, Virginia, Maryland, Pennsylvania, Delaware, New York, Vermont, Colorado, West Virginia and Washington, D.C.
Germany
Stuttgart, Heidelberg, Hohnzollern, Berchtesgaden, Offenburg, Weil der Stadt, Leipzig, Rothenburg, Garmisch-Partenkirchen, Mittenwald, Schaffenhausen, Rudesheim, Munich, Fussen, Ettal, Stein am Rhein, Ludwigsburg, Bodman, Chiemsee, Oberammergau, Berlin, Mainau
France
Paris, Rouen, Bayeux, Strasbourg, Normandy, Mont St. Michel, Nice
Austria
Vienna, Stubai, Salzburg, Bregenz, Innsbruck, Kufstein
Switzerland
Kanderstag, Interlaken, Murren, Thun
England
London, Leeds, Dover, Oxford, Warwick, Canterbury, Stratford-on-Avon, Stonehenge
Scotland
Edinburgh, Glasgow, Sterling, Fort William
Wales
Conway, Portmerion, Snowdonia, Holyhead
Ireland
Dublin, Moher, Wexford, Newgrange, Waterford, Clonmacnoise, Cashel, Belfast
Italy
Florence, Venice, Naples, Aviano, Genoa, Pisa, Vicenza, Nove, Rome, Capri, Palermo
Vatican City
Belgium
Antwerp, Waterloo, Bastogne
Denmark
Copenhagen, Billund
Sweden
Stockholm, Gothenburg
Norway
Oslo
Netherlands
Amsterdam, Delft, Haarlem, The Hague
Czech Republic
Prague
Hungary
Budapest
Spain
Barcelona, Palma de Mallorca, Ibiza
Tunisia
Tunis
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