<html lang="en">
<head>
    <meta charset="utf-8">
    <style>
        #elements .panel {
            min-height: 250px;
        }

        #elements {
            height: 600px;
            columns: 2;
            -webkit-columns: 2;
            border: 2px solid black;
        }

        .list-group-item {
            position: relative;
            overflow: hidden;
            padding: 20px;
            border: 2px solid gray;
        }

        .list-group-item:first-child {
            border-radius: 10px;
        }

        .list-group-item:last-child {
            border-radius: 10px;
        }
        </style> 
</head>
<body>
<div id="elements" class="container-fluid">
    
    <div class="panel panel-default" style="height: 600px">
    </div>
    <div class="panel panel-default">
        <ul class="list-group">
            <li class="list-group-item">Can you see this?</li>
            <li class="list-group-item">You should see text above and below this text.</li>
            <li class="list-group-item">Can you see this?</li>
        </ul>
    </div>
</div>
</body>
</html>