The National Rail Museum in York...not even close to being as boring as it sounds! Beside all the obvious locomotives, carriages, wagons, and miniatures, it was the warehouse that homes over 750,000 objects that stole the show for me. My photographs don't do the visit justice, but it gave me a basic record of inspiration for a personal art project which I am currently under taking on the topic of decay and restoration.
There was also a collection of advertisements arranged along a time scale. Great for visually logging how these evolved. 2 examples: