* Smithsonian Museum, Washington DC: see a V2 * Science Museum, London UK: see completed copy of the Difference Engine * Computing Museum, Berlin DE: lots of old mechanical calculators and Zuse's machines * Bletchley Park, UK. Careful, I think it's only open one weekend a month.
OK, not in any order of preference:
* Smithsonian Museum, Washington DC: see a V2
* Science Museum, London UK: see completed copy of the Difference Engine
* Computing Museum, Berlin DE: lots of old mechanical calculators and Zuse's machines
* Bletchley Park, UK. Careful, I think it's only open one weekend a month.