JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrapper">
    <img src="http://ulrichbangert.de/heimat/Goslar/2016-06-20_Goslar_Altstadt_08.jpg">
    <div class="area" id="area1">
        <ul class="menu" id="menu1">
             <li>Item 1.1</li>
             <li>Item 1.2</li>
             <li>Item 1.3</li>
             <li>Item 1.4</li>
        </ul>
    </div>
    <div class="area" id="area2">
        <ul class="menu" id="menu2">
             <li>Item 2.1</li>
             <li>Item 2.2</li>
             <li>Item 2.3</li>
             <li>Item 2.4</li>
        </ul>
    </div>
</div>

CSS

ul, li {
    margin: 0;
    padding: 0;
}
#wrapper {
    position: relative;
}
.area {
    position: absolute;
    border: 2px solid black;
}
.area:hover {
    position: absolute;
    border: 2px solid red;
    background-image: url(http://ulrichbangert.de/heimat/Goslar/2016-06-20_Goslar_Altstadt_08_rot.jpg);
}
.area:hover .menu {
    display: block;
}
#area1 {
    left:100px;
    top: 50px;
    width: 80px;
    height: 40px;
    background-position: -102px -52px;
}
#area2 {
    left:200px;
    top: 80px;
    width: 100px;
    height: 50px;
    background-position: -202px -82px;
}
.menu {
    display: none;
    list-style: none;
    background-color:white;
    position: absolute;
    width: 80px;
}
#menu1{
    top: 42px;
}
#menu2{
    top: 52px;
}