This is not just another bridge, but the first pedestrian-only bridge to open in central London in more than a century, the last being Tower Bridge in 1894. Designed by Norman Foster and sculptor Anthony Caro, the so-called "blaze of light" is built of aluminum and steel. Thousands lined up to enjoy its opening day. This unique bridge has only one moving part -- it pivots upward when it opens for ships passing below. A stabilization problem led to the closing of the bridge, but reparation work opened it in time for the queen's Golden Jubilee celebrations in 2002. The bridge connects the old City -- St. Paul's Cathedral area -- with the Tate Modern art gallery. On its south side, the bridge marks the middle of the Millennium Mile walkway, which goes past a clutch of popular sights. The views are breathtaking: from the bridge, you can look downriver to the Tower of London, Tower Bridge, and beyond, and up to Somerset House, with the London Eye and Big Ben rising above the river's bend. You'll also have perhaps the best possible view of St. Paul's Cathedral. Tube: Mansion House, Blackfriars, or Southwark.