It probably was a feature film, animated (Western style/cartoon), released before or in early 2000s, set in medieval times, girl protagonist and an evil witch or magician antagonist.
The plot was to collect these magical or elemental crystals, there was a race between the good and the evil to do it and in the end the bad uses the stones and brings destruction.
There was also going behind a waterfall for one, castles and dungeons, maybe some bow and arrow action (not sure on that one).
I've been looking for this for like 10 years now... all of these details are uncertain but the crystal stuff is correct.