In this image, the wizard seems to be magically floating through a brick wall. All right, this one's strictly for when you need some bright, cheerful color. 800x600 640x480 Paul Klee's goldfish, one of his most admired works. This is a computer-generated image I found on the net. There was no clue as to who the artist is.
Nebulae make for some of the most dramatic space images.
Here's that popular image of Earth, as seen from the moon.