The list below is for me to keep track. There is no actual point to count the countries one visited besides planning future trips.
Austria
Graz, Wien
Hungary
Budapest
Canada – home
Several: Toronto, Halifax, Montreal, Vancouver …
US
Several: Chicago, NYC, Detroit, Florida, Los Angeles, Boston, Pittsburgh, Catalina Island.
Mexico
Mexico City, Teotihuacan
UK
London, Manchester
Italy
Milan, Venezia, Florence
Swiss
Zurich, Geneve, Lugano
France
Paris+South France, Disney
Denmark
Copenhagen
Sweden
Malmo
Netherlands
Rotterdam/Amsterdam
Belgium
Brussels
Brazil
Several: sp, rj, floripa, salvador, palmas …
Germany
Berlin, Frankfurt, Rostock
Portugal
Lisbon
Paraguay
Asunción
Liechtenstein
Vaduz
South Africa
Johannesburg, Pretoria
Spain
Barcelona
Iceland* – just passed through
Reykjavik