JSFiddle - React, Tailwind, and code Playground

HTML

<div id="visible"><img src="http://b.vimeocdn.com/ps/372/159/3721596_300.jpg"></div>
<div id="hidden"><img src="http://yuccan.com/wp-content/uploads/2013/04/cool-eez-spaced2.png"></div>

CSS

#hidden {
    display: none;
}

#visible:hover + #hidden {
    display: block;
}

#hidden, #visible {
    width:300px;
    height:300px;
}