Twenty Thousand Leagues Under the Sea of the premiere adventure novels and one of Verne's greatest works, along with "Around the World in Eighty Days" and "Journey to the Center of the Earth". The description of Nemo's ship, the "Nautilus", was considered ahead of its time, as it accurately describes features on submarines, which at the time were very primitive vessels. A model of the French submarine "Plongeur" (launched in 1863) was displayed at the 1867 Exposition Universelle, where it was studied by Jules Verne, who used it as an inspiration for the novel. The title refers to the "distance traveled" while under the sea and
20,000 Leagues Under the Sea: Submarine Voyage (as it was known to the employees) where the "helmsman" stood and controlled the vehicle's operation. The "diving" effect was produced by bubble machines located throughout the attraction, as well as using the waterfalls at the entrance to the show building. Each of the twelve vehicles accommodated a total of forty riders. Vehicles normally cycled through the attraction in packs of three. Despite the extensive 20,000 Leagues Under The Sea overhaul the attraction was given, essentially it was still the same as its Californian counterpart Submarine Voyage, in both its underwater show scenes and narration, except for a few occasional