London Eye in Lambeth

You're standing by the London Eye, the giant wheel on the South Bank of the Thames. Look straight across the water. That's the Palace of Westminster, home of Parliament. The wheel itself is 135 metres tall and 120 metres across. Notice how it's only held up on one side? A single A-shaped frame keeps the whole thing standing. That makes it special: it's the tallest wheel of its kind in the world.