JSFiddle - React, Tailwind, and code Playground

HTML

<section class="itineraries-hub__categories">
  <div class="row">
    <div class="small-6 x-large-4 columns">
      <a class="category__link">
        <div class="category__image-container">
          <img src="http://d5qsyj6vaeh11.cloudfront.net/images/whats available/landscapes/article images/w1400_a_new landscape_main.jpg">
        </div>
        <span class="category__title">
          Discover dramatic scenes
          <span class="category__tag">Explore</span>
        </span>
      </a>
    </div>
    <div class="small-6 x-large-4 columns">
      <a class="category__link">
        <div class="category__image-container">
          <img src="http://d5qsyj6vaeh11.cloudfront.net/images/whats available/landscapes/article images/w1400_a_new landscape_main.jpg">
        </div>
        <span class="category__title">
          Discover dramatic scenes
          <span class="category__tag">Explore</span>
        </span>
      </a>
    </div>
    <div class="small-6 x-large-4 columns">
      <a class="category__link">
        <div class="category__image-container">
          <img src="http://d5qsyj6vaeh11.cloudfront.net/images/whats available/landscapes/article images/w1400_a_new landscape_main.jpg">
        </div>
        <span class="category__title">
          Discover dramatic scenes
          <span class="category__tag">Explore</span>
        </span>
      </a>
    </div>
  </div>
  <div class="row">
    <div class="small-6 x-large-4 columns">
      <a class="category__link">
        <div class="category__image-container">
          <img src="http://d5qsyj6vaeh11.cloudfront.net/images/whats available/landscapes/article images/w1400_a_new landscape_main.jpg">
        </div>
        <span class="category__title">
          Discover dramatic scenes
          <span class="category__tag">Explore</span>
        </span>
      </a>
    </div>
    <div class="small-6 x-large-4 columns">
      <a class="category__link">
        <div class="category__image-container">
     ...

CSS

.row {
    display: table;
    width: 100%;
}

.columns {
  display: table-cell;
  width: 33.4%;
}

.category__link {
    cursor: pointer;
    display: block;
    overflow: hidden;
}

.category__image-container {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: url(/assets/images/resources/blank.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

img {
  position: absolute;
}

.category__title {
    display: block;
    background: #323945;
    color: white;
    font-weight: 400;
    font-family: 'MuseoSansW01-Rounded900', sans-serif;
    font-size: 16px;
    line-height: 2;
    padding: 18px 14px 14px 26px;
    overflow: hidden;
}

.category__tag {
    float: right;
    display: inline-block;
    padding: 6px 12px;
    margin-top: -1px;
    -webkit-border-radius: 2px;
    -moz-border-radius: 2px;
    -ms-border-radius: 2px;
    border-radius: 2px;
    background: black;
    text-transform: uppercase;
    font-weight: 400;
    font-family: 'Proxima Nova W08 Reg', sans-serif;
    -webkit-font-smoothing: antialiased;
    font-family: 'Proxima Nova W08 Bd', sans-serif;
    font-size: 13px;
}

@media only screen and (max-width: 500px) {
  .row {
    display: flex;
    flex-wrap: wrap;
  }
  
  .columns {
    display: flex;
    width: 50%;
  }
}