1.round-bottom {
2 border-bottom-left-radius: 50% 150px !important;
3 border-bottom-right-radius: 50% 150px !important;
4 position: relative;
5 overflow: hidden;
6 width: 160%;
7 margin-bottom:-50px;
8 left:-30%;
9 background-color:#444;
10 background-image: url('https://upload.wikimedia.org/wikipedia/commons/a/a2/Tropical_Forest_with_Monkeys_A10893.jpg'); background-position: center center;
11 background-size: 42% auto;
12 height:150px;
13}
14.container { width: 100%; height: height:100px; padding-bottom:50px; overflow:hidden;}
15
16<div class="container"><div class="round-bottom"></div></div>