If you have ever been to the Highland Light Lighthouse at Provincetown, you will likely recognize the picture below. The image is panoramic and the high resolution image is 15MB and about 13k pixels wide. The image appears cropped here, you can see the complete image at flickr (link on the left).
The image is a composite of 10 discrete images that were stitched using AutoStitch. The software is available for free evaluation at this site.
For more information about Highland Light you can visit their web page at http://www.lighthouse.cc/highland/