3. The Leaky Cauldron’s entrance (42 Bull’s Head Passage, Leadenhall Market and then 7 Stoney St., London)
When Philosopher’s Stone was filmed, the pub was set in Leadenhall Market and its entrance was just an empty shop. Now, though, it’s an opticians called The Glass House. In Prisoner of Azkaban it moves southeast to 7 Stoney St.
7. Hogwarts’ corridors (Gloucester Cathedral’s cloisters, Gloucestershire and New College’s cloisters, Oxford University)
The corridor that leads to The Fat Lady and Gryffindor’s common room is located within Gloucester Cathedral’s cloisters. In Chamber of Secrets, this is also the corridor in which Ginny writes “The Chamber of Secrets has been opened” in blood on the walls.
In Goblet of Fire, everyone sports “Potter Stinks” badges in New College’s cloisters in Oxford University. New College’s quad is also where Mad-Eye Moody turns Draco into a ferret.
11. The room containing the Mirror of Erised/McGonagall’s Transfiguration classroom (Chapter House, Lacock Abbey)
The room where Harry stumbles across the mirror that shows him his deceased parents in Philosopher’s Stone is in Lacock Abbey. In Chamber of Secrets, professor McGonagall uses the same room for her lesson on how to turn animals into water goblets.
14. Hogwarts Library (Duke Humphrey’s Library, Oxford University)
The school library, where Harry researches Nicholas Flamel in Philosopher’s Stone, is located in Oxford’s Duke Humphrey’s Library, which is one of the special collections reading rooms at the Bodleian. In Chamber of Secrets, Hermione reads about Polyjuice Potion there, and in Half-Blood Prince Harry and Hermione discuss who to take to Slughorn’s Christmas party here.
20. Hagrid’s hut (Black Park, Buckinghamshire, and then Clachaig Gully, Scotland)
Based just outside Pinewood Studios in Buckinghamshire, Hagrid’s Hut was set in Black Park. In Goblet of Fire, Black Park is also where Hagrid first shows Harry the dragons before the Triwizard Tournament.
In Order of the Phoenix, it moves to Clachaig Gully in Scotland.
24. The Knight Bus’ route (Green Lanes, Bourne Hill, Park Avenue, Lambeth Bridge)
After picking Harry up in Prisoner of Azkaban, the Knight Bus drives along Green Lanes in Palmers Green, goes through from Bourne Hill, and then turns left into Park Avenue, before dropping Harry off at the Leaky Cauldron.
33. The visitors’ entrance to the Ministry of Magic (Great Scotland Yard, London)
Although the post box that visitors walk through to get into the Ministry of Magic isn’t actually there in real life, it’s located on Great Scotland Yard. This is also where Hermione, Ron, and Harry knock out three Ministry employees in order to steal their identities in Deathly Hallows: Part One.
36. The Death Eaters’ route in Half-Blood Prince (Trafalgar Square, Charing Cross Road, past the Garrick Theatre and Leicester Square Station, Great Newport Street, the Millennium Bridge)
After destroying the Millennium Bridge, they end up on Great Newport Street, which is now the entrance to Diagon Alley.
43. Hagrid’s route to Privet Drive (Dartford Tunnel, London, and Queensbay Birkenhead Tunnel, Liverpool)
When Hagrid is chased by Death Eaters in the first Deathly Hallows film, he enters the southern side of the Dartford Tunnel, which runs under the River Thames. The tunnel’s interior, though, is the Queensway Birkenhead Tunnel under the River Mersey.