Royal officials say the queen will whizz to the top of London's Orbit tower during a visit to the Olympic Park on Saturday.
The queen and her husband, Prince Philip, will take in the panoramic views from atop the 115 metre (380 foot) landmark.
The tower — a ruby red mass of twisting steel that some have likened to a crushed rollercoaster — has divided opinion: some say bold, others eyesore. The queen will be accompanied by her daughter, Princess Anne, but not by her oldest son, Prince Charles, a vocal opponent of edgy modern architecture.
The royals also are due to meet competitors and catering staff at the athletes village.
The games run Friday to Aug. 12.