Here are some example pages to give you an idea of what all can be done.
This page also demonstrates a different menu structure. In addition to the top menu, you can have a menu on the left of the page. Of course it is also possible to only have a menu on the left and none on the top.
A proper menu structure is important, not only for the navigation, but also for the "readability" of a web page.
Notice this text has a white background and the margins are different.
| Here the font is different | This text is white. It is also right- aligned. |
Here the text is centered and green. |