Start this circular walk at the car park next to the Arundel Museum and Heritage Center. Walk north along Mill Road and turn right at the Wildfowl and Wetland Trust. Circle around the area and walk back along Mill Road for a short distance. Head northwest along Swanbourne Lake before turning south again towards Arundel. Before heading back to the car park, make a stop at the Arundel Castle, which was established in 1067. It has since been restored and remodeled after it was damaged in the English Civil War. Tickets can be purchased starting at £13. After touring the castle and its grounds, head back to the car park where you began.