That's not an easy question to answer!
Australia - The greatest country on Earth other than the US and Morocco of course.Never heard a single bad word from anyone whose ever lived in or visited Australia. Friendly people, wonderful natural as well as man made landscapes, Ayers Rock, Great Barrier Reef, tropical beaches, the Sydney Opera House, beautiful coastal cities, the unique Outback experience and the cutest animals. Australia is basically the clean, utopian version of America...all the good stuff we have with fewer enemies, less crime, less illegal immigrants and less drugs.
Italy - Obviously, Has dozens of places you should visit at least once in your lifetime....Venice's canals, the Leaning Tower, Colosseum, the lakes in the Alps, all of Rome's other landmarks, Florence's Renaissance architecture and of course food yummyyyy
Thailand- ahhhh The beaches