Originally conceived as Discovery Mountain, it was originally proposed to hold more than one attraction, including an improved version of Horizons from Epcot, a larger Nautilus walk-through complete with a restaurant and a free-fall ride based on "Journey to the Center of the Earth". But due to budget cuts, it opened in 1995 as "Space Mountain: De la Terre à la Lune" (From the Earth to the Moon). Beside the Space Mountain show building is the Nautilus Lagoon, with a walk-through recreation of the Nautilus submarine from "20,000 Leagues Under the Sea".