Over hill, over dale,
Thorough bush, thorough brier,
Over park, over pale,
Thorough flood, thorough fire!
I do wander everywhere,
Swifter than the moon's sphere;
And I serve the Fairy Queen,
This poem refers to a fairy who happens to be a character that shows up from William Shakespeare’s A Midsummer’s Night’s Dream. As a servent of the queen of fairies, Titania, she wanders off to everything, bushes, briers, parks, and floods, as it is her job to beautify them. 

A Fairy Song