The ArcelorMittal Orbit
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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