#photo-list {
    margin: 0;
    padding: 0;
    margin-bottom: 40px;
    text-align: center !important;
}

#photo-list li {
    display: inline-block;
    padding-right: 10px;
    padding-bottom: 10px;
}

#photo-list li img {
    border: 1px solid #ccc;
}