Hello @artthescience,
Thanks for writing in! 
You can achieve the clickable feature box with your Headline or Text element.
First, you need to add feature-box-1, feature-box-2 and feature-box-3 class names to the class field of your Headline/Text element.
After that, add the following code into Pro > Theme Options > JS:
jQuery(document).ready(function($){
$(".feature-box-1").wrap('<a href="http://officinacasona.com/link-1/" target="_blank"/>');
$(".feature-box-2").wrap('<a href="http://officinacasona.com/link-2/" target="_blank"/>');
$(".feature-box-3").wrap('<a href="http://officinacasona.com/link-3/" target="_blank"/>');
});
You can add more lines if you wish to. Just copy+paste one line and update the link inside the <a /> tag.
E.g. $(".feature-box-4").wrap('<a href="http://officinacasona.com/link-4/" target="_blank"/>');
The code above pertains that each link when clicked will open the page on a new tab.
Hope this helps.