On one of our trips to England, my husband and I did quite a bit of "Harry Potter touring" on our own, just based on research and guide books. A lot of the stuff we saw in Oxford in 2006 can be found here:
And we also made a "pit stop" to see the 165y/o still-in-use train station that became the movie's "Hogwarts Station", during our trip to England in 2010:
Finally, if anyone wants to read about ALL of our trips to England (including, ahem, singing at the Royal Albert Hall. Three times!), just go here and follow the links: