The observation tower, the 115m (377ft) ArcelorMittal Orbit, expects to attract up to a million visitors a year.

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The ArcelorMittal Orbit Tower, a huge public art piece being built in the Olympic Park by sculpture Anish Kapoor, will probably remain open to the public as is.

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With much of the site under construction or stripped down, the visit involves a bird's-eye view from the ArcelorMittal Orbit tower which stands next to the Olympic Stadium.

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