What people call the
Cambridge University library. Designed by Giles Gilbert Scott - the man who designed those red phone boxes and the Bankside power station (now the
Tate Modern), it looks like an odd combination of the two.
It's
big, very very big (and they're currently making it larger), due to it being a copyright library, and able to claim a copy of every book published in the UK. You'd think that with 11 million books you would be able to find the one you need, but you can be sure of someone having signed it out already.