4. Langham Hotel
This stylish West End London hotel opened its doors in 1865 and was a favorite haunt of notable literarti including Oscar Wilde, George Orwell, Mark Twain and Arthur Conan Doyle. Apparently its also a haunt of several supernatural guests who refuse to check out. A phantom man in Victorian garb often appears in October, for some strange reason, and a vision of a German prince who jumped to his death has been spotted in full military regalia. The BBC has even published reports of Napolean III roaming the halls. Room 333 is apparently where most of these ghost guests reside, so you may want to request a different room.