Considering the Durley House in London?
A VT member wrote the following comment about visiting London:
Platform 9 3/4 by skatzcatz
For those of you that are Harry Potter fans i happened upon platform 9 3/4. sadly my wizardry skills arn't very good and i sustained a bruised temple atempting to make the 9pm Hogswart Express. And you ask where it is? Try the Kingscross Station, but from there you are on your own, maybe only wizards see it??????