Millennium Bridge

The lowdown

The Millennium Bridge was London's first new river crossing in over a century, a low steel ribbon designed by Norman Foster and Anthony Caro to read as a blade of light across the Thames. Crossing it is free, and the view is the whole point, St Paul's dome perfectly framed at the north end, Tate Modern's brick chimney at the south.

It is famous for a wobble. When it opened in 2000 so many people crossed in step that it swayed alarmingly and was nicknamed the wobbly bridge, closing for two years while dampers were fitted. It has been rock steady ever since.

Today it is one of the great free walks in the city, linking the old City with Bankside in a couple of minutes, with the river opening out on both sides. Do it at dusk and you get one of London's finest free pictures for nothing.