Over at Google they've made some changes to the way that Google Images handles requests. You can still enter a search request and get the most relevant images returned to you. But now they've added a new way to sort the results you get. Instead of sorting by relevance, you can sort by subject.
Click on the "Sort by Subject" link to the left of the images after you start a search and you will see the different subject for that search. For example, if you search for "Church" you'll get a categories for "Catholic Church" "Baptist Church" and "Inside Church" among others. Then you can click on the subject title to see all the images from that subject. On many of the image searches you can keep following the subject trail down to continue refining your search. If you chose the "Inside Church" subject you could get more subjects underneath that, like "People Inside Church" and "Inside Old Church."
Check out the video below to see more about the new searching features.