High-Dynamic-Range photographs are generally achieved by shooting the same image several times using exposure bracketing. Once the images are taken several times at different exposure levels they are then merged together into one HDR image.
However, I've used Photoshop with Topaz Adjust 4 plugin to get the same effect.
Woburn Abbey Gardens Panorama
Woburn Abbey Gardens
Forth Rail & Road Bridges
Waiting for the Summer
Telford