Lego master Tommy Oswin Williams spent the day building a miniature Tower Bridge in front of the real landmark in London.
The whole process took him 13.5 hours using 4,295 pieces.
The real Tower Bridge took 8 years to build.
Watch this impressive time-lapse video to see how the Lego structure came together.
Thanks to Tommy Oswin Williams for this video. This is one creative project from his Year of Projects. You can also see more of his videos on this YouTube channel.
Produced by Claudia Romeo