It's elementary my dear Watson, London is only a chunnel away from Paris. Visit Britain is running a contest to unlock the mysteries of London in conjunction with Robert Downey Junior's film, Sherlock Holmes. If you've done your detective work, you probably discovered the prize includes 2 airplane tickets to London, 4 nights at a Radisson Edwardian hotel, a walking tour of Sherlock Holmes' London, dinner for two at the Sherlock Holmes Pub, and 2 tickets to the Sherlock Holmes Museum. Bone up before you go by watching The Hound of the Baskervilles, Young Sherlock Holmes, Private Life of Sherlock Holmes, Return of Sherlock Holmes, Murder By Decree, and Without a Clue. There's no mystery when it comes to entering.
Voilà - the link to Sherlock Holmes' Unlock the Mysteries of London Sweepstakes: