To start with, for context I'm from America, and the only continent I've been to is North America. Of course there are other places in North America I'd like to visit, but I'll exclude it for the purpose of this thread.
That being said, starting with the continent I'd most like to visit:
Europe > Asia > South America > Africa > Oceania > Antarctica
It was really hard to choose between Europe and Asia for me. They both have countries that I'd love to visit, but ultimately, I decided to pick Europe as the continent I'd like to travel to first. There are so many European countries that I'd love to visit, such as Germany, France, the UK, Ireland, Spain, Switzerland, Italy, Greece, The Netherlands, Sweden, Finland, and so on. Of course Asia has a lot I'd love to visit as well, such as Japan, South Korea, China, Thailand, India, and, while I don't have a specific country picked out at the moment, a Middle Eastern country would be cool as well. Petra in Jordan maybe, or some other historical place.
South America and Africa are also pretty close in my ranking, but I'm learning Spanish, so South America would probably make more sense. Although, Brazil speaks Portuguese, and I wouldn't mind visiting there as well. But the South American country I'd most like to visit is probably Peru. For Africa, Egypt and Morocco are the first that come to mind. Madagascar, Botswana, and Namibia as well
For Oceania, Australia and New Zealand, for example, are places that I think would be nice to visit, but it ultimately just comes down to me being more interested in visiting the other continents. Antarctica is the only one that I really have zero interest in visiting.
Overall, every continent has some beautiful locations, and I really wish I could visit them all, except Antarctica. I don't think that one's for me