There are currently 18 countries and 22 territories that do not have a permanent natural river flowing within them, though some of them have streams or seasonal watercourses such as wadis. [1]
The Arabian Peninsula is the largest subregion in the world without any permanent natural river. Countries in this subregion have wadis instead.
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has generic name (help) ("The Kingdom has no rivers, lakes or any permanent body of standing water...").