Ok so I have to make a website map for a parks working trail, with rollover waypoints tag for location on the map. It says to make <a> tags for the images and information on the map. I'm having a hard time getting started. The source code for the images and information is in the same html code as the map, but when it is done the only time you should see them is when you rollover over numbered location on the map. I don't understand how to write a <a> tags. Here is the html code for the first points.

<img src="image0.jpg" alt="" />
<p>
<span>3:30 a.m.</span> Start from the Longs Peak Ranger Station,
nine miles south of Estes Park. Be sure to pack food, extra water,
sunblock, and warm clothes, gloves, and caps.
</p>
</div>

If you could get me started thank you.