JSFiddle - React, Tailwind, and code Playground

HTML

<div id="newyork">
    <img src="http://beyondeurope.net/wp-content/uploads/2014/08/Top_10_Universities_in_New_York_City.jpg" />
</div>

CSS

#newyork {
   width: 300px;
   height: 300px;
   background: red;
}

#newyork img {
    height: 100%;
    width: auto;
}