Time-lapse of Anish Kapoor and Cecil Balmond's Orbit
11 May 2012 Last updated at 00:00 BST
Anish Kapoor and Cecil Balmond's spiralling sculpture in the heart of the Olympic Park is being unveiled on Friday.
The 114.5m (375ft) structure - named the ArcelorMittal Orbit - is the UK's tallest sculpture.
This time-lapse footage and recent aerial pictures track the Orbit's construction.
Timpe-lapse courtesy of ArcelorMittal