The Making of Harry Potter: Warner Bros. Studio Tour in London!
Check out these neat graphics to make your time touring more insightful! Be sure to give yourself a large chunk of time if Potter is near and dear to your heart!
Prepare to drool just as much or more than a visit to The Wizarding World of Harry Potter theme park in Orlando, FL.
Walking through quickly, you can be done in about 30-60 minutes. Keep in mind there is a themed food court in the middle of the tour where you can stop for lunch, as well as an extensive gift shop the tour leads you into at its conclusion.
I was last to leave the sets when my study abroad group went together. If you're anything like me, you may end up spending about six hours wandering around, trying to remember how to breathe...