Could anyone inform me whether I could fly from Europe to Africa and then back to Europe to my point of origin? For example, AMS-KRT-AMS as part of RTW ticket? In this case, may I fly back to my point of origin or do I need to return to another destination?

What I understood is that you can only cross the Atlantic and Pacific once but one may cross between Europe and Africa/Middle East as many times, correct?

Tks,