The Sacramento River bends to the east and then turns back south at Redding California. Turtle Bay Exploration Park attracts visitors from the local area and around the world. Spanning the river there is the famous Sundial Bridge. It really is a sundial; on the ground are markers indicating the time of day when the bridge spire’s shadow passes on June 21, the summer solstice. (You’ll need to extrapolate on other dates.)
The park also contains the obligatory gift shop and a café. As with most dining establishments, shirts and shoes must be worn. I don’t know what goes on in Redding, but it apparently necessitates displaying a rule that bottoms also are required.