Aerial image of Maiden Castle, an Iron Age hill fort, Winterborne Monkton, near Dorchester, Dorset, England, United Kingdom, Europe

Aerial image of Rybury Camp, an Iron Age hill fort with Neolithic causewayed enclosure, Wiltshire, England, United Kingdom, Europe

Aerial image of Maiden Castle, an Iron Age hill fort, Winterborne Monkton, near Dorchester, Dorset, England, United Kingdom, Europe

Aerial image of Danebury Ring, an Iron Age hill fort, Wiltshire, England, United Kingdom, Europe

Aerial view of the Westbury White Horse and the Iron Age Bratton Camp Hill Fort, Wiltshire, England, United Kingdom, Europe

Aerial image of Battlesbury Camp, an Iron Age Hill fort, Warminster, Wiltshire, England, United Kingdom, Europe

Aerial image of Maiden Castle, an Iron Age hill fort, Winterborne Monkton, near Dorchester, Dorset, England, United Kingdom, Europe

Aerial image of Mount Caburn with the remains of an Iron Age hill fort, east of Lewes, East Sussex, England, United Kingdom, Europe

Aerial image of Badbury Rings, an Iron Age hill fort, Dorset, England, United Kingdom, Europe

Iron-age British Camp hill fort and the Malvern Hills in autumn, Great Malvern, Worcestershire, England, United Kingdom, Europe

Aerial image of Beacon Hill, an Iron Age hill fort, Burghclere, Hampshire, England, United Kingdom, Europe

Misty autumn morning above Cadbury Castle Iron Age Hillfort, Cadbury, Devon, England, United Kingdom, Europe

Cadbury Castle Iron Age Hillfort at dawn in spring, Cadbury, Devon, England, United Kingdom, Europe

Aerial vista of Cadbury Castle Iron Age Hillfort, Devon, England, United Kingdom, Europe

Carl Walk Iron Age Hill Fort in autumn, Hathersage Moor, Peak District National Park, Derbyshire, England, United Kingdom, Europe

Sunset over Iron-Age hill fort of Beacon Hill, near Highclere, Hampshire, England, United Kingdom, Europe

Castell Henllys, a reconstructed Iron Age hill fort circa 600BC, Pembrokeshire Coast National Park, Pembrokeshire, Wales, United Kingdom, Europe

Badbury Rings, an Iron Age hill fort in east Dorset, built about 2200 years ago, southern England, England, UK, Europe

Badbury Rings, an Iron Age ring fort to the east of Dorset, about 2200 years old, southern England, England, United Kingdom, Europe

View of the remains of the Iron Age hill fort, Blackbury Camp, Devon, England, United Kingdom, Europe