The Little Mermaid: Ariel's Undersea Adventure is a dark ride attraction based on the 1989 Disney animated film The Little Mermaid, located in Paradise Pier at Disney California Adventure and in Fantasyland at Walt Disney World's Magic Kingdom, where it is titled Under the Sea: Journey of the Little Mermaid . The ride opened on June 3, 2011 at Disney California Adventure, and on December 6, 2012 at Magic Kingdom.HistoryIn the early-to-mid-1990s, Walt Disney Imagineering attempted to develop a Little Mermaid dark ride for Disneyland Paris and Magic Kingdom parks. Early plans for Tokyo DisneySea and Hong Kong Disneyland also included this ride. None of these versions were actually built, although a computer-generated ride-through animatic was included on the Platinum Edition DVD of The Little Mermaid in 2006.Disney later went on to design and build a different version of the attraction for Disney California Adventure, as part of an effort to revitalize that park in the 2000s. The Little Mermaid: Ariel's Undersea Adventure opened on June 3, 2011 in an area of Paradise Pier formerly occupied by Golden Dreams.