Transparent circle in a div

div{
    position:relative;
    width:500px; height:200px;
    margin:0 auto;
    overflow:hidden;
}
div:after{
    content:'';
    position:absolute;
    left:175px; top:25px;
    border-radius:100%;
    width:150px; height:150px;
    box-shadow: 0px 0px 0px 2000px #E3DFD2;
}

body{background: url('https://farm9.staticflickr.com/8760/17195790401_ceeeafcddb_o.jpg');background-size:cover;}

Source: stackoverflow.com

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