The Spinnaker Tower uses two large, white sweeping steel arcs to represent a sail in the wind. It was part of Portsmouth's plans for the Millennium, and should have been completed in 1999.
They didn't start building it till 2001 and it took 4 years to finish, by which time it was madly over-budget.
I love it.
An elevator sweeps you up the inside of the building and takes you to the viewing deck.
Just so that you can look down.
Down through the glass floor
to the ships below
and to the sea.