Up to 85* countries (with 86th coming this weekend).
*Plus I've been to Guam & Puerto Rico (which aren't countries - but still - hard to consider Guam the USA).
Argentina
Aruba
Austria
Australia
Azerbaijan
Bahamas
Belgium
Belarus
Belize
Bonaire
Bosnia and Herzegovina
British Virgin Islands
Bulgaria
Cambodia
Canada
Cayman Islands
Chile
China
Colombia
Croatia
Curacao
Cyprus
Czech Republic
Denmark
Egypt
Estonia
Fiji
Finland
France
French Polynesia
Germany
Georgia
Greece
Hong Kong
Hungary
India
Indonesia
Ireland
Israel
Italy
Japan
Jordan
Kazakhstan
Laos
Latvia
Lithuania
Maldives
Malaysia
Mexico
Micronesia
Morocco
Monaco
Moldova
Myanmar
Netherlands
New Zealand
Norway
Panama
Palau
Papua New Guinea
Paraguay
Poland
Portugal
Romania
Russia
Serbia
Singapore
Slovenia
Slovakia
South Korea
Spain
Sri Lanka
Sweden
Switzerland
Thailand
Turkey
Taiwan
Ukraine
United Arab Emirates
United Kingdom
United States
U.S. Virgin Islands
Uruguay
Vatican
Vietnam
85 countries graphic
You can build your own travel map graphically with this
link if you'd like. It's free.