Wiltshire

Helen Skelton tours the mysterious chalky grasslands of Wiltshire. She begins her journey amongst Wiltshire's ancient landscape by climbing Europe's largest man-made mound, the mysterious Silbury Hill. Helen then learns the importance of the area's chalky landscape and the wildlife it attracts, at Markham Banks.

Near Devises, Helen helps out with the maintenance of the magnificently restored Caen Hill lock system, and encounters alien species in the form of Himalayan balsam and Japanese knotweed at Tisbury. Finally, Helen walks a thin line in Salisbury when she joins a team of slackliners in the park.