If your Harry Potter obsession is getting out of hand and the studio tour just won't cut it anymore, these 17 real life locations from the films might.1. The Hogwarts Express611504950e23' align='center' size='medium' share='true' caption='' expand='' crop='original'][/image] The Hogwarts Express is actually a real train which runs across 84 miles of railway in Western Scotland. In muggle speak, it's a steam train named the Jacobite..Passengers board in Fort William and Mallaig, which is near the highest mountain in Britain, Ben Nevis, before passing the deepest freshwater loch, Loch Morar, and the deepest seawater loch, Loch Nevis.The Hogwarts Express runs from April to October, with single adult fares starting at about $38 USD (£29.00).2. GringottsWhile Gringotts is located inside Diagon Alley in the books, the movie uses Australia House on the Strand as the location for the Wizarding Bank. Access into the building will be refused unless you've got an Australian visa, but it's pretty beautiful from the outside.3. Grimmauld Place12 Grimmauld Place, aka Siruis Black's house and the headquarters of the Order of the Phoenix, was inspired by Lincoln's Inn Fields. But, Claremont Square in London was used as the exterior.4. Professor Flitwick's ClassroomProfessor Flitwick lectures Charms at Hogwarts, and the classroom he "teaches" in is situated in an all boys boarding school in Harrow, London. It's a Year 10 study room, and although tours of the school can be a bit wary about letting you see the room, it's worth a try.5. HogwartsAlnwick Castle in Northumberland is used during the Quidditch scenes in Harry Potter and the Philosopher's Stone and Harry Potter and the Chamber of Secrets. This might explain why the castle now offers "broomstick flight training" classes. 6. Hogsmeade stationWhen the students get on the train at King's Cross Platform 9 3/4 to go to Hogsmeade on an old steam train, they really get off at Goathland in North Yorkshire, the train station where it was filmed. Hogwarts has been edited into the background with special effects, but apart from that, it's pretty much exactly the same as it looks in the film.7. Train bridgeThe Glenfinnan Viaduct is featured in four of the Harry Potter films when Harry and his fellow students are on the train back to Hogwarts. It's situated in Lochaber, Scotland, and used for passenger trains to connect Glasgow to Mallaig. The Jacobite steam train still operates for the tourist trade.8. Cafe inside the train stationIn Harry Potter and the Half-Blood Prince, Harry reads about the attack on the Millennium Bridge in a little cafe inside a train station, and Dumbledore later picks him up. It was filmed at Surbiton Railway Station in the suburbs of southwest London.9. Diagon AlleyIf you've been to Warner Bros. Studios in London, you probably know that Diagon Alley was eventually built into a massive set, but initially in the first movie, Leadenhall Market was used to shoot the exterior of the magical shops. It's located in the City of London and is a beautiful Victorian covered market. The blue shop by the Bull's Head Passage was used as the entrance to the Leaky Cauldron.10. The Reptile HouseWhen Harry first discovered he can speak parseltongue, he was visiting The Reptile House with the Dursleys, which is actually London Zoo. In the reptile section, there's a plaque alongside the tank that held the snake in the movie, but it's really home to a black mamba rather than a boa constrictor.11. The Great HallAn incredible replica set was created for the films, but J.K. Rowling based Hogwarts' Great Hall on the one at Christ Church, Oxford University - and if/when you see it, you'll understand why. It's amazing.12.The Cave by the seaIn Harry Potter and the Half-Blood Prince, Harry and Dumbledore go in search of one of Voldemort's horcruxes in an unnamed cave by the sea. The location used is Ireland's Cliffs of Moher.13. The Black LakeDespite several expanses of water surrounding Hogwarts, a lot of the filming - including Durmstrang's arrival to the Triwizard Tournament in Harry Potter and the Goblet of Fire - were filmed at Loch Shiel in Scotland. 14. The Portkey landing placeWhen Harry, the Weasleys, the Diggorys and Hermione grab hold of the Portkey, they land on a cliff right near the Quidditch World Cup stadium. The location is just a two-hour train ride from London in Seven Sisters Country Park in Seaford.15. The Millennium bridge If you've been to London in the last 10 years, the chances are you've seen a Harry Potter location without realizing it - the millennium bridge that connects Tate Modern to St Paul's Cathedral over The Thames. 16. Piccadilly CircusSimilar to number 15, this is a famous tourist attraction in London without the Harry Potter link - but, this is where the golden trio end up when Hermione apparates them away from danger in Deathly Hallows Part 1. Oh, and then they nearly get run over by a bus.17. 4 Privet DriveAlthough the whole street was later replicated at Leavesden Studios in North London, 4 Privet Drive is actually based on Little Whinging in Picket Post Close, Berkshire. It's a normal suburban street situated just outside London, and only the exterior of 12 Picket Close was used - because, unsurprisingly, they don't have a bedroom under the stairs.