After visiting the place it was filmed, I know the movie is sure to be great.
A dangling modifier is one that does not that does not achieve the purpose of modification in which it was intended.
It fails to modify what is is meant to modifier
In the sentence, “After visiting the place it was filmed, the movie is sure to be great.”, the dangling modifier is "After visiting the place it was filmed"
A revised sentence that fixes the dangling modifier is:
After visiting the place it was filmed, I know the movie is sure to be great.
In the revised sentence above, the modifier now modifies the subject "I", and it is no longer hanging.
