That's a good question, I think you're referring in a positive way I imagine . Quite a few actually, Chile and Colombia in South America were amazing, much better than I expected in terms of different landscapes, architecture, culture etc.
I thought Kiev-Ukraine and Bucharest-Romania were surprisingly beautiful and interesting cities if we are talking about Europe, and Iceland has mind-blowing nature and landscapes of a rare beauty. Going over to the Middle East and Central Asia, I have to mention Iran, definitely a must see in the area, and great friendly people as well. Uzbekistan and Turkmenistan would make the cut as well for different reasons, Uzbekistan has so much culture to offer with Samarkand and Bukhara, while Turkmenistan has no tourists whatsoever, and when I went to see the infamous gate to hell in the middle of the Karakum desert I was amazed to be the only one there, such an amazing spectacle to enjoy by myself, it's a luxury that you don't come across almost at all nowadays where everywhere is becoming commercial. Bhutan stunned me last summer, what a magical country, I felt like I went back in time while I was there. North Korea makes the list as well, it's the most surreal place I have ever been so far, I had seen so many documentaries about it before I took the trip there, but being there and watching everything first hand is like being part of the Truman show if you know what I mean.
Last but not least Africa, South Africa has something for everyone, such a stunning country. Mozambique has so much potential and I was surprised by the beauty of its coast and so little infrastructure for tourists, and then Eritrea, being from Italy while visited Asmara I could recognize everywhere the Italian vibe in the architecture of their buildings, the name of the streets, the vibrant café lifestyle on the main strip in Asmara, and the people were really delightful.