High Dynamic Range photography is something I am just starting to play with. You take 3 images and use a computer to blend them together. Each image is about 1 F-stop apart which makes one under exposed, one correct exposure, and the last over exposed.
The beauty of this, is that you can use the dark areas from the over exposed and the highlights from the under exposed to really create a dramatic enhancement of the main image.
This is my first real try :