Fantasia is a feature length film created by Walt Disney in 1940. This feature length combines the mixture of cel-animation with the soundtrack of a live orchestra. What makes the animation from Disney well remembered is its eastern European influence with a darker, more evil sense of story and animation.
Fantasia features a series of animations ranging from live action footage of the orchestra to cel animated cartoons of mickey mouse, at the time of the animation Disney's fading character. The more memorable animations within the feature would be 'The Sorcerer's Apprentice' and 'Night on Bald Mountain', which are certainly the more darker animations.
The Sorcerer's Apprentice:
Night on Bald Mountain: