If you're lover of the photographic technique, then check out this image and our architectural series found on www.getzcreativecommercial.com. These images are not just one, or two exposures, but rather 7 or more different images have been used to create each one.
In an effort to capture the vast magnificence of the Grand Canyon, we took 28 different exposures, combined them into an HDR image, applied a tone-mapping technique, and then stitched them together in one big panoramic image.
You don't always need 28 images to create an HDR image, many times I use only 7-9 exposures, but every shot is different, and you need to take into account the area you're shooting and what you want to capture, to help you decide how many you'll need for the image you want to create.
Happy shooting, and drop me a line if you've done some HDR work.
I look forward to seeing your vision.
-TJ