An 87-mile (139km) National Trail, the Ridgeway runs from Overton Hill near Avebury in Wiltshire to Ivinghoe Beacon in Buckinghamshire. Part of this route follows the oldest road in the country, dating back millennia. Taking 5-7 days, this is not a difficult walk and the rewards are many: wide views across rolling countryside, Iron Age forts, Neolithic burial mounds, white horses carved into the chalk downs and picturesque villages.