What is the ending of willie wonka and chocolate factory end?

At the end of "Willy Wonka and the Chocolate Factory," Charlie Bucket is chosen as the heir to Willy Wonka's chocolate factory due to his honesty and pure heart. Wonka gives a demonstration of various gadgets with Oompa Loompas assisting him. They enter a glass elevator and fly away towards an unknown destination, possibly Wonka's private residence, leaving the adults outside the factory gates