anywhere north of the south pole such that, after walking south one mile, the "circumference" of that latitude is one mile, or some integer fraction (e.g., 1 mile west results in 4 "laps"), then one mile "north" will return to same starting point.
Oh bugger off.
Tisk tisk. Cannot end a sentence with a preposition
Oh bugger off, jerk. There, FTFY.
All power corrupts, but we need electricity.