Back in July and August I posted several articles about the Chihuly glass exhibit at Crystal Bridges Museum of American Art. Part of the exhibit was "Chihuly in the Forest" and it is still on display. I thought that the pieces were beautiful during the day, but they are spectacular at night. Here are a few examples.
And if the Chihuly glass exhibit isn't abstract enough for you, then...
Just wiggle the lens during the exposure.