Код:
<!--HTML--><style>

.map_bg {
    width: 838px;
    height: 838px;
}

.map_bg0    {position: absolute;}
.map_bg0 img {width: 838px;}

.map_pin { 
position: relative; 
display: inline-block
} 
.map_pin span { 
display: none; 
} 
.map_pin a { 
    color: #ffffff!important;
}
.map_pin a:hover {        text-shadow: 0 0 2px white!important;}

.map_pin:hover span{ 
position:absolute; 
text-align:center; 
display:inline-block; 
margin-top: 10px; 
left:0px; 
z-index:100000;
}



</style>


<div class="map_bg">
<div class="map_bg0"><img src="http://2game.vn/data/pictures/2game/2018/05/08/4276d779-2game-ban-do-sanhok-pubg-anh-6.jpg"></div>

<div class="map_pin"><a href="ССЫЛКА" original-title="">.</a><span><img src="https://forumstatic.ru/files/0019/ac/8e/21291.png" original-title=""></span></div> 
</div>