Choose either Java or Flash, depending upon your PC capabilities.

For a great view, click on the "full screen" button once the panorama loads.
 

Originally panoramic photography was done using special cameras that would actually turn slowly to reproduce a panorama on a long strip of film.  That works well, but it's expensive.  Today it can be done by taking a whole series of individual overlapping shots, and then using software to "stitch" together the images, producing one big long, or tall, picture.