A U-boat below Tower Bridge, tanks in Ludgate and the Crystal Palace still extant. Welcome to another set of rarely seen images of London.
The photos are drawn from a special section of Flickr known as The Commons. The project collects images from photographic archives and uses the 'wisdom of the crowd' (that'll be you lot) to tag and annotate the shots. The result is much richer than an officially labelled archive.
Here are some of the finer images from London. Click on each shot to get more details. Because these images often come from foreign archives, they are little used in British media, offering a fresh glimpse of bygone times.