The sundial bridge is located in Redding, CA. The bridge rises to about 217 feet above the ground, and is more than just a bridge. Infact, the sundial bridge is actually the largest sundial in the world, hence the name of the bridge. The sundial is only completely accurate one day out of the year, the summer solstace on June 21st. The bridge is 700 feet long, and is used for pedestrian traffic only.