The three continents that have never hosted the Olympic Games are Africa, Antarctica, and South America (for the Winter Olympics specifically). However, context matters:

  • For any Olympic Games (Summer or Winter), Africa and Antarctica are the only continents that have never hosted.
  • South America has hosted the Summer Olympics once (Rio de Janeiro 2016), but has never hosted the Winter Olympics.

So if the puzzle or quiz is about “which three continents have never hosted the Winter Olympics” , the answer is:
Africa, South America, and Antarctica.