British Library's Public Domain Images

Personal favourites:

SciFi/Space collection: https://www.flickr.com/photos/britishlibrary/albums/72157638...

King's Topographical Collection: https://www.flickr.com/photos/britishlibrary/albums/72157716...

The white type on these collection labels is often unreadable without careful examination. That is surprisingly unprofessional. I really would have liked to view all the labels, but I soon got a headache.