London 2012: Olympic Park trees to become artwork
The 10 biggest trees in the Olympic Park are to be turned into works of art as part of a permanent reminder of the London 2012 Games.
Engraved metal rings, six metres (20ft) wide and up to half a tonne (500kg) in weight, will be wrapped around the red oak, silver lime and common ash trees.
The tree branches and ring will slowly fuse together over time.
The Olympic Park in Stratford, east London, will feature 4,000 semi-mature trees and about 300,000 wetland plants.
The project has been funded by the Olympic Delivery Authority (ODA) and Arts Council England and designed by artists Heather Ackroyd and Dan Harvey.
They said in a statement: "Trees mark the passing of time through their yearly ring growth.
"The artwork will transform as the seasons change, reflecting the evolving nature of the Olympic Park."
London 2012 - Begin your journey here
The ODA said the trees would stand up to 18m (60ft) tall and mark out the entrances to the 500-acre Olympic Park.
There will be nine history rings with words giving information relevant to each location inscribed on the inside while the memories of residents will be featured on the 10th tree, an English oak.
The shadow cast by this ring will be inlayed on to the ground in bronze so that each year it will momentarily align to commemorate the date and time of the London 2012 Games.