Furdle, you're at university.
Go to the library, lol.
You'll find plenty of books and magazines and the like.
You should be able to get geography or history or anthropology books, with things on castles and landscapes and cities and buildings.
You don't even need to see pictures to be inspired.
If you'd be interested in castles, then I would highly recommend trying to find the following;
English Castles, R. Allen Brown, B.T. Batsford Limited, 1976 (ISBN 0 7134 3119 9)
Castles, Tom McNeill, B.T. Batsford Limited, 1996 (ISBN 0 7134 7024 0)
Both of these are really good and interesting reads into English/Welsh castles, their design and structure, as well as providing pictures and diagrams of various real castles, and their structures.