.container {
  position: relative;
  max-width: 998px;
  width: 100%;
  margin: 0 auto;
}

.card-columns {
  -webkit-column-count: 3; /*Выставляем кол-во колонок*/
  -moz-column-count: 3; /*Выставляем кол-во колонок*/
  column-count: 3; /*Выставляем кол-во колонок*/
  -webkit-column-gap: 15px; /*Отступы между колонками*/
  -moz-column-gap: 15px; /*Отступы между колонками*/
  column-gap: 15px; /*Отступы между колонками*/
  orphans: 1; /*минимальное число строк в блочном контейнере*/
  widows: 1; /*минимальное количество линий на странице*/
}

.card {
  overflow: hidden;
  position: relative;
  display: inline-block;
  width: 100%;

  word-wrap: break-word;
  border-radius: 8px;
  margin-bottom: 10px;
}

.card-reveal .card-body {
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  width: 100%;
  text-align: center;
  height: 100%;
  bottom: -100%;
  -webkit-transition: bottom .2s ease-in-out;
  transition: bottom .2s ease-in-out;
}

.card-reveal .card-img-top {
  -webkit-transition: -webkit-transform .5s ease-in-out;
  transition: -webkit-transform .5s ease-in-out;
  transition: transform .5s ease-in-out;
  transition: transform .5s ease-in-out, -webkit-transform .5s ease-in-out;
}

.card-reveal:hover .card-body {
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
}

.card-reveal:hover .card-img-top {
  -webkit-transform: scale(1.3);
  transform: scale(1.3);
}

.card-reveal .card-body .card-title {
  font-size: .75rem;
  margin: 0;
  text-transform: uppercase;
  font-weight: bolder;
  color: #fff;
}

@media (max-width: 768px) {
  .card-columns {
    -webkit-column-count: 2;
    -moz-column-count: 2;
    column-count: 2;
  }
}

<div class="container">
    <div class="card-columns">
      <a class="card card-reveal" href="#">
        <img class="card-img-top" src="https://source.unsplash.com/jTGjg-NDLyM/600x400" />
        <div class="card-body">
          <div class="card-title">Look forward</div>
        </div>
      </a>

      <a class="card card-reveal" href="#">
        <img class="card-img-top" src="https://source.unsplash.com/whpWiJHBAVo/600x400" />
        <div class="card-body">
          <div class="card-title">Drops of rain</div>
        </div>
      </a>

      <a class="card card-reveal" href="#">
        <img class="card-img-top" src="https://source.unsplash.com/fqgt7A43-K0/400x500" />
        <div class="card-body">
          <div class="card-title">Umbrella kiss</div>
        </div>
      </a>

      <a class="card card-reveal" href="#">
        <img class="card-img-top" src="https://source.unsplash.com/WxFRIj4KGTk/400x600" />
        <div class="card-body">
          <div class="card-title">The Tulip</div>
        </div>
      </a>

      <a class="card card-reveal" href="#">
        <img class="card-img-top" src="https://source.unsplash.com/dSua0aBdSTU/600x500" />
        <div class="card-body">
          <div class="card-title">postes</div>
        </div>
      </a>

      <a class="card card-reveal" href="#">
        <img class="card-img-top" src="https://source.unsplash.com/4nMr12C6Pw8/400x500" />
        <div class="card-body">
          <div class="card-title">Read to smile</div>
        </div>
      </a>

      <a class="card card-reveal" href="#">
        <img class="card-img-top" src="https://source.unsplash.com/DMS_Lz32y2A/400x200" />
        <div class="card-body">
          <div class="card-title">Tower of Terror</div>
        </div>
      </a>
    </div>
  </div>