Les Mystères du Nautilus (French for "The Mysteries of the Nautilus") is a walkthrough attraction at Disneyland Paris in France. It is an updated version of the 20,000 Leagues Under the Sea walkthrough attraction that was at Disneyland in Anaheim, CA in the early 1950s, based upon the film of the same name.This attraction takes guests throughout the various rooms of Captain Nemo's submarine, especially those seen in the film. It opened on 4 July 1994.