Imagine getting the tube one day and coming face to face with Hagrid and Harry on their way to Diagon Alley!
How about a butterbear at the Leaky Cauldron, then travelling along the Central Line to see the Goblins at Gringotts?
Make sure you don’t fall asleep on the tube though, or you might end up in Azkaban!
If you could travel to a place in the world of Harry Potter for the day, where would you go? Let us know in the comments below!