Try it Yourself - W3.CSS images

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="/lib/w3.css">
<body>

<div class="w3-container w3-teal">
<h1>Summer 2015</h1>
</div>

<div class="w3-third">
<div class="w3-card-2">
<img src="img_5terre.png" style="width:100%">
<div class="w3-container">
<h5>5 Terre</h5>
</div>
</div>
</div>

<div class="w3-third">
<div class="w3-card-2">
<img src="img_monterosso.png" style="width:100%">
<div class="w3-container">
<h5>Monterosso</h5>
</div>
</div>
</div>

<div class="w3-third">
<div class="w3-card-2">
<img src="img_vernazza.png" style="width:100%">
<div class="w3-container">
<h5>Vernazza</h5>
</div>
</div>
</div>

</div>
<div class="w3-row-padding w3-margin-top">

<div class="w3-third">
<div class="w3-card-2">
<img src="img_manarola.png" style="width:100%">
<div class="w3-container">
<h5>Manarola</h5>
</div>
</div>
</div>

<div class="w3-third">
<div class="w3-card-2">
<img src="img_corniglia.png" style="width:100%">
<div class="w3-container">
<h5>Corniglia</h5>
</div>
</div>
</div>

<div class="w3-third">
<div class="w3-card-2">
<img src="img_riomaggiore.png" style="width:100%">
<div class="w3-container">
<h5>Riomaggiore</h5>
</div>
</div>
</div>

</div>

</body>
</html>