Back to Update

What am I?
I am an imaginary line that circles the Earth. This painted red line represents me and is located in Ciudad Mitad del Mundo which means "middle of the world city" in Spanish.

Looking for a Clue?
Photoperiod clues reveal which mystery sites are north and south of me -- the line that divides the globe into two hemispheres.

What am I?
Photo: Wikipedia/C.T. Johansson