The post on places I have lived has inspired another list, Countries I have visited, other than the country of my birth:

• Antigua
• Australia
• Canada
• Cyprus
• Denmark
• Egypt
• France
• Germany
• Greece
• Italy
• Mauritius
• Morroco
• Netherlands
• Norway
• Portugal
• Scotland
• Seychelles
• South Africa
• Spain
• Sweden
• Switzerland
• Thailand
• United Arab Emirates
• United States
• Vatican City
• Wales

The foreign country I have spent the longest time in is the United States, probably 3 or 4 months in total, the shortest time was likely to be Denmark, just long enough to get a bus from Copenhagen airport and onto a fast ferry to Malmö (This was before the Öresund link opened).