St Nicholas Park stretches along the north bank of the Avon below the castle. The setting is the appeal: the castle towers rise behind the trees, swans drift on the river, and on a fine summer Sunday it is filled with picnicking families, dog-walkers, and people learning to scull at the Warwick Boat Club.
There is a children's play area, a paddling pool in summer, a small skate park, and the start of a pleasant riverside walk that runs all the way out towards Leamington. Free, open during daylight hours.