I've always been inspired by Pre-Raphaelite paintings, so here are a few by John William Waterhouse--really makes me want to read up on the stories/myths that inspired them!
"The Lady of Shalott"
"Undine"
"Hylas and the Nymphs"
"Ophelia"
"The Awakening of Adonis"
"The Naiad"
"Miranda"