Viewing Pages Within Sections

Okay, I've created numerous sections within my exhibit. Now I want to create the entry page to my Features section. I went into the editing mode of that section and added a page. I chose a layout, added an image and some text. I saved it. What I want is that when you click on the main nave "Features" tab (using Berlin theme) for it to go to that page. But I don't seem to be doing that correctly. I simply get a 404 when I click on the tab.

So, how do I create the link between the main nav and a page I create? Thx.