I go with a movie: The Empire Strikes Back.
It's a great example of exciting and dramatic adventures by characters who are really just blindly stumbling forward, without any great quest that comes to a neatly wrapped up resolution.
And it's just full of a range of wonderful fantastical places where the many varied encounters happen.
Would be a great addition to the thread D&D General - Appendix EN+ :. What movies, books, and comics inspire your for D&D? too.