I want a creative image prompt for an AI such as DALL-E 2. I want an image that represents an imaginary landscape. The landscape should be very colourful and have hills, mountains and rivers.
An example of such a prompt could be:
A beautiful landscape with hills, mountains and rivers, digital art, fantasy, luscious colors

You should however note that not one prompt fits everyone's desires and that you most likely will have to edit this prompt to fit your own preferences.