A stone circle at Machrie Moor on the isle of Arran. Getty Images
Stonehenge, whose stones may have originally stood in a Welsh circle, according to a new theory. Getty Images
The Ring of Brodgar (alternate spelling Brogar) Neolithic standing stone circle and henge, in Stenness, Scotland. The standing stones date to approximately 2,000-2,500 BC and are one of the most important Neolithic sites in the Orkney. The circle the stones form is 130metres in diameter. Getty Images
This dazzling and beautifully preserved stone circle is two miles up Swinside Farm track on private farmland. A sign advises visitors to leave their cars and walk. Getty Images
Nine Ladies Stone Circle, Stanton Moor, Derbyshire, England. Rex Features
Visitors walk besides the Neolithic stones at Avebury in Wiltshire, England. A leading travel magazine has recently named the collection of stones - thought to have been constructed around 2600BC and the largest stone circle in Europe, as the second best heritage site in the world. The Wiltshire world heritage site has been placed ahead of much more recognisable sites including the Valley of the Kings in Egypt, Taj Mahal in India and the Forbidden City in China. Getty Images
Clava Cairns, circular chamber tomb cairn from the Bronze Age, Balnuaran of Clava, Scotland, United Kingdom. Getty Images
Blencathra Mountain, which is up for sale, overlooks the Neolithic stone circle of Castlerigg in Keswick, United Kingdom. The Earl of Lonsdale, Hugh Lowther, has put Blencathra up for sale for 1.75M GBP to try and pay off an inheritance tax bill. Local community groups are now using social media to campaign and raise money to buy the 2,850ft (869m) mountain and keep it in British ownership. Getty Images
Drombeg Stone Circle, County Cork, Ireland. Rex Features
A stone circle at Machrie Moor on the isle of Arran. Getty Images
Stonehenge, whose stones may have originally stood in a Welsh circle, according to a new theory. Getty Images
The Ring of Brodgar (alternate spelling Brogar) Neolithic standing stone circle and henge, in Stenness, Scotland. The standing stones date to approximately 2,000-2,500 BC and are one of the most important Neolithic sites in the Orkney. The circle the stones form is 130metres in diameter. Getty Images
This dazzling and beautifully preserved stone circle is two miles up Swinside Farm track on private farmland. A sign advises visitors to leave their cars and walk. Getty Images
Nine Ladies Stone Circle, Stanton Moor, Derbyshire, England. Rex Features
Visitors walk besides the Neolithic stones at Avebury in Wiltshire, England. A leading travel magazine has recently named the collection of stones - thought to have been constructed around 2600BC and the largest stone circle in Europe, as the second best heritage site in the world. The Wiltshire world heritage site has been placed ahead of much more recognisable sites including the Valley of the Kings in Egypt, Taj Mahal in India and the Forbidden City in China. Getty Images
Clava Cairns, circular chamber tomb cairn from the Bronze Age, Balnuaran of Clava, Scotland, United Kingdom. Getty Images
Blencathra Mountain, which is up for sale, overlooks the Neolithic stone circle of Castlerigg in Keswick, United Kingdom. The Earl of Lonsdale, Hugh Lowther, has put Blencathra up for sale for 1.75M GBP to try and pay off an inheritance tax bill. Local community groups are now using social media to campaign and raise money to buy the 2,850ft (869m) mountain and keep it in British ownership. Getty Images
