question: Who inspired a themed area included a dark ride attraction with the Kasvapan River?
answer: James Cameron
context: Title: Mr. Toad's Wild Ride
  Passage: Mr. Toad's Wild Ride is a dark ride at Disneyland Park, also formerly located at the Magic Kingdom.  Originally planned to be a roller coaster, it became a dark ride attraction because Walt Disney only wanted attractions that were appropriate for all ages.  It is one of the few remaining attractions that was operational on the park's opening day in 1955 (although the current version of the ride opened in 1983).  The ride's story is based on Disney's adaptation of "The Wind in the Willows" (1908), one of the two segments of the film "The Adventures of Ichabod and Mr. Toad" (1949).  It is currently operating in Fantasyland.
  Title: Pandora – The World of Avatar
  Passage: Pandora – The World of "Avatar" is a themed area inspired by James Cameron's "Avatar", located within Disney's Animal Kingdom theme park at the Walt Disney World Resort in Bay Lake, Florida, near Orlando.  Set a generation after the events of the "Avatar" films, the area is based upon the fictional exoplanetary moon, Pandora, and features Pandora's floating mountains, alien wildlife, and bioluminescent plants.  Spanning 12 acres , Pandora – The World of "Avatar" includes two major attractions, "Avatar" Flight of Passage and Na'vi River Journey, as well as retail and dining outlets.
  Title: Radiator Springs Racers
  Passage: Radiator Springs Racers is a simulated slot car type dark ride attraction in Cars Land at Disney California Adventure.  The attraction features a third-generation version of transport technology originally developed for the Test Track attraction at Epcot in Walt Disney World.  Radiator Springs Racers is themed to the fictional world in Disney·Pixar's "Cars".  At a cost of over $200 million, the attraction is the most expensive at Disneyland Resort and one of the most expensive theme park attractions in the world.  It accounted for about 18% of the entire cost of the $1.1 billion expansion of Disney California Adventure Park.  The attraction takes guests in a six-person vehicle through encounters with characters from the film series "Cars".  Guests then race another vehicle through turns and hills, ending with a randomized race result.
  Title: Mystic Manor
  Passage: Mystic Manor () is a dark ride attraction in the Mystic Point area of Hong Kong Disneyland.  Unlike Disneyland's Haunted Mansion attraction and its counterparts in other Disney parks, Mystic Manor has a lighthearted, fantasy-based theme with no references to departed spirits or the afterlife, due to differences in traditional Chinese culture.  The attraction does feature several references to the Haunted Mansion, such as a Medusa changing portrait, a conservatory, and the busts that turn to follow visitors as they move.  References to other Disney attractions include several figures similar to those from The Enchanted Tiki Room in the Tribal Arts room.  The Manor's exterior design is inspired by the now-demolished Bradbury Mansion that stood at 147 North Hill Street in Los Angeles' Bunker Hill, designed by Samuel Newsom and Joseph Cather Newsom, who also designed the still-standing Carson Mansion in Eureka, California.
  Title: Maelstrom (ride)
  Passage: Maelstrom was a log flume dark ride attraction located in the Epcot theme park at Walt Disney World Resort in Florida.  Designed by Walt Disney Imagineering, the ride opened on July 5, 1988, in the Norway Pavilion of the park's World Showcase section.  It was a mix between a log chute and a traditional film attraction.  Visitors rode boats patterned after longships that passed through various scenes that featured audio-animatronic figures.  The attraction was originally supposed to be called SeaVenture, with the entrance sign during construction even displaying it as such.  But sometime between March 1988 and the ride's opening, it was changed to Maelstrom.
  Title: The Seas with Nemo &amp; Friends
  Passage: The Seas with Nemo & Friends (formerly The Living Seas) is an aquarium and attached dark ride attraction in Future World at Epcot at the Walt Disney World Resort.  The attraction is themed as an underwater exploration base, with several exhibits devoted to oceanic study.  The pavilion opened in 1986, but had been planned as part of the park since its opening in 1982.
  Title: Na'vi River Journey
  Passage: Na'vi River Journey is a dark ride attraction at Disney's Animal Kingdom's Pandora – The World of "Avatar".  The ride takes guests through the Kasvapan River of Pandora from the 2009 film "Avatar", showcasing native animals and bioluminescent flora, with inclusion of Audio-animatronics.
citations: Na'vi River Journey Pandora – The World of Avatar