<style>
.popup {position:relative;}
.popup span {position:fixed;top:121px;left:2500px;z-index:99;}
.popup:hover {visibility:visible}
.popup:hover span {top:101px;left:1px;}
</style>
<a class="popup" href="#"><img src="https://i.imgur.com/rcivwQJ.jpg" width="144" height="90">
<span><img src="https://i.imgur.com/rcivwQJ.jpg" width="474" height="290"></span></a>
<a class="popup" href="#"><img src="https://i.imgur.com/WeZKATz.jpg" width="144" height="90">
<span><img src="https://i.imgur.com/WeZKATz.jpg" width="474" height="290"></span></a>
<a class="popup" href="#"><img src="https://i.imgur.com/s87KUJb.jpg" width="144" height="90">
<span><img src="https://i.imgur.com/s87KUJb.jpg" width="474" height="290"></span></a>