I originally blogged about these cutaway diagrams a number of years back but Matt's post prompted me to re-visit them. The one above of Piccadilly Circus is by Gavin Dunn from 1989 and you can buy a reproduction from London Transport Museum's poster collection
There's a lovely 3D cutaway illustration of Bank and Monument stations found via skyscrapercity
Here's one of Liverpool Street from Crossrail's website
If anyone knows where there are more 3D Tube station cutaway designs please let me know in the comments. Have you seen any other 3D Tube maps that would work & help us get around the London Underground?
Thanks to everyone who has added more images in the comments. Many thanks to Ivan who found one I particularly like. It's an amazing one of Camden Town Underground by the cutaway artist Leslie Ashwell Wood.
Ivan also found a mirrored site by Paul Mison of collection of many more 3D Cutaway drawings of London Underground station that was formerly on Geocities (remember them!).
There are some lovely illustrations in there too including the one above an official poster with a prediction of what the "new" Bond Street Tube station would look like after its completion in 1976. So check the link.