The three-hour walking tour's attractions include the original Great Hall of Hogwarts School, built for Harry Potter And The Philosopher's Stone.
Tom Felton, who played Draco Malfoy, said:
"I will never forget walking through the Great Hall for the first time. It was just as magical now as it was."
More top news
Police said 375 people attended a rally in Newcastle by the anti-Islam group Pegida, while 2000 people joined a counter-demonstration.
Kelly Osbourne has quit Fashion Police after the E! show came under fire over a comment Giuliana Rancic made about Zendaya's dreadlocks.
The death of Boris Nemtsov hits particularly hard because he represented what post-Communist Russia might have become.