7 July 2008 16:54 UK
A major archaeological investigation is getting under way at one of Western Europe's most impressive prehistoric sites.
The Ring of Brodgar in Orkney is the third largest stone circle in the British Isles, but little is known about it.
A scheduled ancient monument, the stone circle and henge of the Ring of Brodgar is part of 'The Heart of Neolithic Orkney' World Heritage Site, inscribed by UNESCO in 1999.
BBC NEWS | UK | Scotland | North East/N Isles | Uncovering stone circle's secrets
A major archaeological investigation is getting under way at one of Western Europe's most impressive prehistoric sites.
The Ring of Brodgar in Orkney is the third largest stone circle in the British Isles, but little is known about it.
A scheduled ancient monument, the stone circle and henge of the Ring of Brodgar is part of 'The Heart of Neolithic Orkney' World Heritage Site, inscribed by UNESCO in 1999.
BBC NEWS | UK | Scotland | North East/N Isles | Uncovering stone circle's secrets