If you want to see all images of a particular website, you can use the "site:" operator on Google Images (images.google.com) – you may know this operator from Google's web search. For example, enter site:cnn.com into the Google Images search box to see all images shown on CNN's website. Click on an image in the result list and you're taken to the respective page containing the image.
This approach is fun if you want to visually explore a site, and you are not interested in any particular content on that site. However, you can still combine the site search with an additional keyword. A search for site:cnn.com clinton would therefore show CNN's images of President Bill Clinton, or images related to him.
Want to try this out on a site a little more fun than CNN? I suggest you enter the following for thousands of riveting photo illusions: site:worth1000.com