Images taken with a "macro" lens, a lens which is capable of taking very close up images, often within a couple of inches of the subject, and producing an magnified or 1:1 reproduction of the subject, With a macro lens you can get a detailed shot of, say, the eye of an insect.

These images are, with the exception of a few flowers, macro images taken of mineral colorations and reflections on the surface of tiny puddles of water or tree bark, very close up