I may not understand the question either, but if you're asking how to get to the "pictures" forum (as opposed to main or general chit-chat, or...) then it depends on where you start.
Most of the time you can click "back to home page", which is in the first line, far right side, under the heading at the top. This will give you a list of the forums (main, pictures, ...) Click on Pictures and you will get all the topics in that forum, time dated by latest post.
If you're reading any given topic you can also go to the very bottom of the page, where it says "Select a forum" on the right. Click in the arrow and it will list the forums there.