Mouldon Hill Country Park
This pretty country park near Swindon has some nice footpaths to follow through the site. In the park you'll find a pretty lake, the River Ray, a section of the North Wilts Canal and nice views from the high points.
You can cycle to the park from Swindon along National Cycle Network Route 45. To continue your exercise you could visit the nearby Lydiard Country Park. Here you'll find 260 acres of lawns, woodlands and pasture to walk or cycle through.
If you head south from the park you will soon come to Shaw Forest Park where footpaths will take you through ash/willow woodlands and scrub land containing juniper and alder.