Paliwal Park, also called Hewitt Park, is the largest urban park in Agra — a wedge of trees, lawns and walking paths north of the fort, much used by morning joggers and evening picnickers. There is a small artificial lake with paddle boats, a children's zoo, and a Sound and Light show on weekend evenings.
It is not a sight in itself, but a useful breathing space in a city not over-supplied with quiet corners. Free entry.