Places to visit (virtual):

• ARM (Advanced RISC Machines Ltd)

http://www.arm.com
• Intel

online museum
• Planet Microchip

http://www.microchip.com

Places to visit (real & online):

• The Science Museum, London: "Computing then and now" tracing the evolution of computers, with working exhibits and showing the original machines.
• Manchester University Computer Building: see the 'baby' and other world-firsts in the field of computing.
• Bletchley Park, Bletchley, Buckinghamshire, UK: see the worlds first electronic digital computer, the COLOSSUS
• The Smithsonian Institute, Wasington DC, USA
• The Intel Museum, Santa Clara, USA

Some external sites with interesting information: