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