A link doesn't have to be text. It also could be an image and open the picture in a popup window or a new tab.

To insert the image as a link, you'll need the <img> tag that contains several attributes:

• src identifies the image location and tells the browser the file address

• height and width refer to image measurements

• alt provides alternative text that helps users of assistive technologies receive information about the page without actually seeing it

All you need is to place the <img> tag inside the <a> element. Don't bother to close it — the <img> tag is an empty one.