In London, Leadenhall Market doubles up as the exterior of Diagon Alley, a beautiful Victorian market. Inside, there is a blue door in Bull's Head Passage, which is the entrance into The Leaky Cauldron.
Whilst 'Harry Potter' wasn't actually filmed here, The Great Hall in Christ Church college in Oxford is the inspiration behind the wizard school's dining hall. An exact replica of this hall was built in the film studios but that is long gone now so this is the next best thing. You'll really feel like you've been transported back to the set of the hit movie.
Now you're in Oxford, it is worth taking a photograph on the steps leading up to Christ Church's Great Hall as these are the same steps used by Professor McGonagall when she welcomes everyone to the wizarding school.
Oxford is also home to a number of other filming locations for the hit movie including the New College cloisters where Moody turns Malfoy into a rat in 'Harry Potter & the Goblet of Fire' and Duke Humfrey's medieval library in the iconic Bodleian Library doubles up as the Hogwart's Library. The Divinity School at the Bodleian Library is where they shot scenes in The Hogwart's Infirmary.
However, one must visit is Alnwick Castle in Northumberland, which features in The Philosopher's Stone and The Chamber of Secrets. Here, Harry learned how to ride a broomstick whilst the courtyard is where Harry and Ron crashed the family car.
Fairly new but a must visit for Potterheads is the Warner Bros. Studio Tour in Leavesden, which has replica sets from the movie, props and costumes of the film and an impressive model of Hogwarts Castle.