I'm a small Harry Potter fan so of course when me and my friend were in London we had to go visit some places where the movies were shot! We went to King's Cross to take the train at Platform 9 3/4, we went to the Diagon Alley (both at day and night) and of course we walked the Millenium bridge over the Thames! At King's Cross we also visited the Harry Potter shop to shop for our wands ;) (though they were so expensive that we didn't buy any) The Diagon Alley was shot at the Leadenhall Market, which you can find quite close to the Tower Bridge.