During the sequence with the explorers' huge submarine submerging, one of the computerized "extras" can be seen waving at the camera. (He is seen through the lower window for only a second or two; use frame advance to view it or listen to the Visual Commentary on the DVD for specifics).

Voice actor Jim Varney (Cookie) died of lung cancer in 2000 before his recording could be finished. Cookie's farewell to Milo, "I ain't so good at speechifyin', but I want you to have this. It's the cookin' grease from the whole trip," is the only line that wasn't recorded by Varney.

Originally, the beginning scene was different. It showed a group of vikings who were looking for Atlantis being attacked by the Leviathan. The makers thought it didn't fit in very well with the story once the characters got to Atlantis, so it was deleted and replaced by the scene of Atlantis being drowned.

Similar to how "The Lion King" was accused of stealing material from "Kimba: The White Lion", this movie also has ties to another Japanese program of the same nature. Have a read about "Nadia - The secret of blue water" and you will see similarities between the sets, character designs and plots. Here is one link, there are many more out there about it: http://www.thesecretofbluewater.com/atlantis-i.htm It makes one wonder if any of Disney's movies are orginal ideas.