<div id="quad">
  <figure>
  <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/rose-red-wine.jpg" alt="rose-red-wine">
  <figcaption>Rose Red Wine</figcaption>
  </figure>
  <figure>
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/green-glass-bottle.jpg" alt>
    <figcaption>Green Glass Bottle</figcaption>
  </figure>
  <figure>
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/guinness-barrels.jpg" alt>
    <figcaption>Guinness Barrels, Dublin</figcaption>
  </figure>
  <figure>
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/crystal-skull-vodka.jpg" alt>
    <figcaption>Crystal Skull Vodka</figcaption>
  </figure>
</div>
body { 
  font-family: Avenir, sans-serif; margin: 0; 
  background-color: #121;
}
div#quad { 
  background-color: #000; 
  font-size: 0; width: 60%; 
  margin: 0 auto;
  box-shadow: 0 0 12px rgba(0,0,0,0.8);
}
div#quad figure { 
  margin: 0; width: 50%; 
  height: auto; transition: 1s; 
  display: inline-block; 
  position: relative; overflow: hidden; 
}
div#quad figure:hover { cursor: pointer; z-index: 4; }
div#quad figure img { width: 100%; height: auto; }
div#quad figure:nth-child(1) { transform-origin: top left; }
div#quad figure:nth-child(2) { transform-origin: top right; }
div#quad figure:nth-child(3) { transform-origin: bottom left; }
div#quad figure:nth-child(4) { transform-origin: bottom right; }
div#quad figure figcaption { 
  margin: 0; opacity: 0; 
  background: rgba(0,0,0,0.3); 
  color: #fff; padding: .3rem; 
  font-size: 1.2rem; 
  position: absolute; 
  bottom: 0; width: 100%;
	transition: 1s 1s opacity; 
}
.expanded { transform: scale(2); z-index: 5;  }
div#quad figure.expanded figcaption { opacity: 1; }
div.full figure:not(.expanded) { pointer-events: none; }
var quadimages = document.querySelectorAll("#quad figure");
for(i=0; i<quadimages.length; i++) {
  quadimages[i].addEventListener('click', function(){ this.classList.toggle("expanded"); quad.classList.toggle("full") }); 
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js