NEW CHALLENGE

Congratulations to Cadet Christian Valentin who correctly answered that this would be possible only if the individual started from the North Pole.  Think about it.

Here's a simple challenge:

A man walks a mile directly south, turns, walks a mile directly west, then turns again, heads a mile directly north, and somehow finds himself exactly where he started.  How is this possible?

Good luck.  See me if you think you know the answer.  No guessing.