The Warner Bros. Studio Tour London - The Making of Harry Potter: This is the most comprehensive and immersive Harry Potter experience. It's located at the Warner Bros. Studios Leavesden, where the films were made. You can see actual sets, props, costumes, and learn about the filmmaking process.
The British Library's "Harry Potter: A History of Magic" Exhibition: This exhibition showcased the real-life inspirations behind J.K. Rowling's magical world. It's no longer running, but the British Library has a permanent collection of Harry Potter materials you can view.
Other Harry Potter Locations in the UK:
* Platform 9 3/4 at King's Cross Station: This iconic location is where Harry boards the Hogwarts Express.
* Leadenhall Market: This historic market is where Diagon Alley was filmed.
Outside the UK:
* Universal Studios Hollywood and Universal's Islands of Adventure (Orlando): Both offer Harry Potter-themed lands with rides, shops, restaurants, and more.
* The Wizarding World of Harry Potter in Osaka and Tokyo: This is a smaller version of the Universal Studios experiences in the US.
So, depending on what you're looking for in a "Harry Potter museum" experience, you have a variety of options to choose from.