On Saturday, towns and cities across the globe switched off non-essential lights for Earth Hour. Click through our gallery for a rare chance to see London with the lights out. Not sure what Earth Hour is? Find out here.
Many thanks to the following photographers for use of their photos via flickr: Fred, LouisBerk.com, and Real London Photos.
Have you got any pictures you want to share? Why not add them to the Londonist flickr pool?