heres a riddle (not too hard)?

[Albert]

here,s a riddle (not too hard)
from where i am i walk in a straight line for one mile,turn 90 degrees left, walk another mile,turn left again, walk another mile but i am back in the same spot???????

 

[The Crazy One.]

SOUTH POLE

 

[Ernie's Answers]

Walking the race track....?

 

[aletha_409]

baseball diamond.

 

[maddog27271]

north pole or south pole!