The first Disney animated film that's not a musical, does not contain any songs neither performed by characters, nor in the background.
Due to its dark content and poor box office performance, it wasn't released on video until 1998.
Known by many as "the movie Disney tried to bury", fans of the fantasy genre and this movie have tried many times to get the deleted footage restored.
The first Walt Disney Animation Studios movie to have full closing credits with music, and the first to have any sort of closing credits since Alice in Wonderland (1951) (which only featured a voice cast, despite it already appearing in the opening credits (only featuring the voice actor and actress names without the ones they voice)).
This was the first Disney movie to feature the "classic" Walt Disney Pictures logo: the white castle and text over a blue field. This logo would be used until the new CGI logo was introduced with Pirates des Caraïbes: Le coffre du mort (2006).