There isn't a commonly known imaginary line drawn through the Earth from the North to South Pole that ends in "R".

Here's why:

* Existing Lines: The most famous lines drawn through the Earth are the Equator (dividing Earth into Northern and Southern Hemispheres), and Meridians (lines of longitude running from pole to pole).

* No "R" Significance: The letter "R" doesn't have any established geographical significance or connection to a specific imaginary line.

Possible Options:

* You could create your own imaginary line! You could call it the "R Meridian" or the "Rhombus Line," and define its purpose.

* Consider a different letter: Maybe you're thinking of a line that ends in "S" (like the South Pole), or a line that starts with "R" (like the "Roamer Line").

Let me know if you have any other ideas or details, and I'll try to help you come up with a name for your line!