What's your fav? Mine is the Museum of Science and Industy in Manchester. I also really like the Burrell Collection: mostly the idea/story of it rather than the collection on show, but you don't get to see most of it I suppose.
I am going to the following places in the next wee while, so please recommend me museums and galleries or even specific exhibitions you think are good. I like bees, trains and medieval history.
Cambridge, Ely - places in this general area. omg ELY cathedral :D