This photo is of the <a href="//commons.wikimedia.org/wiki/London_Eye" title="London Eye">London Eye</a> on the 7th of April 2006 as viewed from the rear. It is a 6 second exposure and taken with a Canon 5D  and 24-105mm f/4L IS lens at 24mm, f/4 and ISO 50.
<a href="//commons.wikimedia.org/wiki/User:Diliff" title="User:Diliff">User:Diliff</a>
CC BY 2.5
Taken by user