Jack and Jill windmills, atop the South Downs at Clayton, are a Sussex icon. The views across the Sussex Weald and along the Downs are sensational. A great place to go for a walk with children, you can avoid any steep climbs by parking in the free car park next to the windmills. Then follow the track along the ridge to Ditching Beacon – a glorious roundtrip of about 5km. Alternatively, just plonk yourselves in the field in front of the mills, admire the view and allow the kids to run it all off.