A sundial is a simple, yet accurate, instrument, which tell time by the movement of the shadow a pointer casts upon a dial, which marks the hours of the day. The shadow moves as the sun changes position in the sky throughout the day, and the dial tracks this movement.
For a sundial to be accurate, the pointer must be slanted at an angle equal to the latitude of its location.
Arizona is the proud owner of the World's largest sundial located in Carefree, Arizona .
It stretches 62 feet.