Private Tour: London Harry Potter Tour by Black Cab Including Thames River Cruise. See real-life Harry Potter filming locations on this private, 4-hour tour of London. With your very own guide chauffeuring you around by black cab, you’ll visit spots that featured in the big-screen adaptations of JK Rowling’s best-selling books. Get up close to Gringotts Bank, drive across ‘Knight Bus Bridge,’ see the Leaky Cauldron and visit Grimmauld Place, the Ministry of Magic and more. Then, follow the same route Harry took when he flew over London on his broomstick with your included hop-on hop-off Thames River cruise ticket. Book and Save 10% Off Private Tour: London Harry Potter Tour by Black Cab Including Thames River Cruise.