This question already has an answer here:
Here is another puzzle:
The year is 1895 and subaltern Henry Faversham, of the British army, is being interviewed by Maude Muckraker for the Independent London Times. It looks as if Maude is having her doubts about the yarn young Henry is spinning. He claims that on a recent hike his outfit, starting at some undisclosed part of the world, marched due south for 100 miles, then due east for 200 miles, turned once again and marched due north for 100 miles and ended up back where it had started from.
"Impossible", snorts Maude, terminating the interview. "What is your claim, young man, is patently impossible!"
Is Maude wrong, or is there a spot on earth where Henry could have carried out this march? Can you tell us where this exotic place is located?