Dark Waters (Once Upon a Time) is to take Snow's heart. The Land of Untold Stories is revealed to be the Mysterious Island from the book as the same name. The "Nautilus" is based on the submarine from "Twenty Thousand Leagues Under the Sea". Captain Nemo based on the protagonist from Jules Verne's novel "Twenty Thousand Leagues Under the Sea". Hook refers to the giant squid that attacks him as a kraken. The kraken is a legendary sea monster of giant size that is said to dwell off the coasts of Norway and Greenland. The episode posted its lowest numbers so far in the series, as
20,000 Leagues Under the Sea: Submarine Voyage to those who pass by. The lagoon remained as a scenic viewpoint (and was renamed "Ariel's Grotto", complete with a King Triton spouting statue) until 2004, when the water was drained and the sets and infrastructure were demolished. Pooh's Playful Spot was built where the attraction formerly stood and operated between 2005 and 2010 before making way for the Seven Dwarfs Mine Train as part of the Fantasyland Expansion. 20,000 Leagues Under the Sea: Submarine Voyage 20,000 Leagues Under the Sea: Submarine Voyage was an attraction at the Magic Kingdom theme park at Walt Disney World from 1971 through 1994.