Hadrian's Wall hosts 73 mile illuminated balloon artwork
31 August 2012 Last updated at 22:48 BST
A colourful line of pulsating balloons has lit up the night sky along the 73 mile (117km) length of Hadrian's Wall.
The digital art installation featuring 400 balloons was set up as part of the London 2012 Festival celebrations.
David Sillito reports.