Just recently, we were on a 75-day trip to the Middle East and Europe. Here's the list of 17 countries that we managed to cover in those 75 days:

UAE (Dubai)
Jordan (Amman, Petra)
Egypt (Cairo, Luxor, Aswan, Abu Simbel)
Greece (Athens, Santorini)
Italy (Rome, Florence, Pisa, Venice, Milan)
Vatican City
Norway (Oslo, Tromso)
Switzerland (Zurich)
Germany (Munich, Berlin)
Austria (Salzburg, Vienna)
Hungary (Budapest)
Czech Republic (Prague)
Netherlands (Amsterdam)
England (London)
France (Paris)
Spain (Barcelona)
Turkey (Istanbul)