London's Millennium Bridge.

The London Millennium Footbridge is a pedestrian-only steel suspension bridge crossing the River Thames in London. 

Londoners nicknamed the bridge the Wobbly Bridge after crowds of pedestrians felt an unexpected swaying motion on the first two days after the bridge opened. The bridge was closed and modified, and further modifications eliminated the "wobble" entirely.

This view is taken from the South side near the Tate Modern Museum looking towards St Paul's Cathedral. The bridge is aligned in such a way that a clear view of St Paul's south facade is seen between the bridge supports. I simply waited for the crowds to clear leaving one man to give some human interest and a lead in into the photograph.

Canon 30D, Canon 17 - 85mm lens.