Noob question about html/css in codepen

Any idea why the picture border stretches across the page like it is?

Thanks!

You put the class .picture-border on your div (which by default fills the width of the page, I think) instead of on your img.

<div>
  <img class="picture-border" src = "https://c1.staticflickr.com/1/634/32400087791_1e68bc6c8c.jpg">
  <!--<div class="caption text-left">The Rev</div> -->
</div>