An explorer has travelled the length and breadth of Britain to photograph over 400 mysterious hidden ancient sites.
Dave Hamilton, 44, ventured across the country from the Isle of White to the Orkney archipelago to uncover ruins which have stood for up to 10,000 years.
He avoided famous and obvious sites like Stonehenge and decided to focus on little-known lost ruins.
The journey includes encounters with sacred tombs and caves, stone circles, Bronze Age brochs and Iron Age hillforts.
They are captured in his new book, Wild Ruins BC, where he retraced the footsteps of our prehistoric ancestors.
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Borvemoor on the Isle of Harris. This remote island is home to only 1,916 people and is renowned for its gin. This prehistoric monument is a relic from an era thousands of years ago
Bryn Cader Faner north Wales. It is a Bronze Age round cairn which lies to the east of the small hamlet of Talsarnau. Perched atop a mountain, it resembles a crown of thorns made out of rocks
Machrie Moor standing stones on the Isle of Arran. It is part of a rich archaeological landscape that dates back to between 3500 and 1500 BC and includes stone circles, standing stones, burial cairns and cists
Mr Hamilton says one of his favourite sites is Brenig 51 in north Wales which was a 70ft (21 metre) ancient Bronze Age burial platform.
Bryn Cader Faner, also in north Wales and perched atop a mountain, resembles a crown of thorns made out of rocks.
The chambered long barrow at Stoney Littleton in Somerset, which can clearly be seen from the sky, also served as a burial tomb.
In the early 19th century the Reverend John Skinner entered through a hole in the roof and found human bodies still within each chamber, along with pottery fragments.
The giant 4,500 year old Rudston Monolith in north Yorkshire is 25ft (7.5 metres) tall, towering over the graves in the churchyard.
The 'Langdale Axe Factory' near the summit of the Pike of Stickle in the Lake District was a production site for stone axes which were distributed around Britain.
Callenish stone circle in Lewis originate from the late Neolithic period and are common on some of the isolated islands off the coast of the UK
Avebury in Wiltshire. Avebury is a Neolithic henge monument made of three stone circles surrounding the village. The henge is more than three quarters of a mile in circumference and it would have been originally up to 29 feet deep
T'reri Cereri in north Wales. Mr Hamilton avoided famous and obvious sites like Stonehenge and decided to focus on little-known lost ruins scattered across the country from the Isle of White to the Orkney archipelago
T'reri Cereri, Wales. It is one of the images cpatured by Mr Hamilton for his book, Wild Ruins BC, in which seeks to retrace the footsteps of our prehistoric ancestors