Sundial Bridge at Turtle Bay - Sundial

Sundial

The support tower of the bridge forms a single 217 foot (66 metre) mast that points due north at a cantilevered angle, allowing it to serve as the gnomon of a sundial; it has been billed as the world's largest sundial, although Taipei 101 and the associated sundial design of its adjoining park are much larger. The Sundial Bridge gnomon's shadow is cast upon a large dial to the north of the bridge, although the shadow cast by the tower is exactly accurate on only one day in a year – the summer solstice, June 20 or 21. The time is given as Pacific Daylight Time. The tip of the shadow moves at approximately one foot per minute so that the Earth's rotation about its axis can be seen with the naked eye.