New Brighton Library, Christchurch
The library itself is really small, but it's right on the beach and has a great view of the sea with comfy chairs where you can read and listen to music. The Children's section has interactive games and playstations. There's 2 cafes in it, you can have a walk on the pier, or do a 10km beach walk around the South Shore split and come back to where you started from. There's also the New Brighton Mall, an attempt at making a shopping street.
The New Brighton Clock Tower was finished in 1935 and can be found not too far from the Pier in Marine Parade.
A perfect day is a cup of coffee, a good book to read in a cozy chair, and beautiful sea views right at your feet.