Computer History Museum @ Mountain View http://www.computerhistory.org/
Intel Museum @ Santa Clara https://www-ssl.intel.com/content/www/us/en/company-overview/intel-museum.html
Living Computer Museum @ Seattle http://www.livingcomputermuseum.org/
There's a fine guidebook called the Geek Atlas, which should be what you're looking for. Bit US centric though: http://shop.oreilly.com/product/9780596523213.do
> Bletchley Park is great for its own exhibition, plus it
> has the UK's national museum of computing
They still have a running Colossus replica too - well worth a visit.
The replacement is "Connected Earth": https://en.wikipedia.org/wiki/Connected_Earth
> Connected Earth is a UK network of organisations, primarily museums, that preserve the history of telecommunications in the UK. Heritage artefacts are physically dispersed to Connected Earth partners and other institutions as appropriate, and are brought together again online through virtual galleries, searchable catalogues and educational resources at its website.