<div class="wrapper">
  <figure class="container">
    <img src="https://assets.codepen.io/12005/bristol-harbor.jpg">
    <img src="https://assets.codepen.io/12005/suspension-bridge.jpg">
    <img src="https://assets.codepen.io/12005/tk-balloon1.jpg">
    <figcaption class="caption">Bristol is a pretty nice place to live.</figcaption>
  </figure>
</div>

:root {
  --light-gray: hsla(300, 4%, 81%, 1);
  --ghost-white: hsla(225, 100%, 99%, 1);
  --davys-grey: hsla(12, 5%, 36%, 1);
  --blue-sapphire: hsla(196, 67%, 33%, 1);
 --charcoal: hsla(207, 38%, 25%, 1);
}
/* from https://coolors.co/d0ccd0-fbfcff-605856-1c6e8c-274156*/

img {
  max-width: 100%;
  display: block;
}

* {
  box-sizing: border-box;
}

body {
  background-color: var(--charcoal);
  font: 1.2em/1.3 Roboto, sans-serif;
}

.wrapper {
  box-sizing: border-box;
  width: 960px;
  height: 540px;
  margin: 100px auto;
  background-color: var(--ghost-white);
}

.container {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: 1fr auto;
  padding: 40px;
  margin: 0;
  list-style: none;
}

.container img {
  aspect-ratio: 1/1;
  grid-row: 1 / 3;
  height: 100%;
  width: 100%;
  object-fit: cover;
}

.container :nth-child(1) {
  grid-column: 1;
}

.container :nth-child(2) {
  grid-column: 2;
}
.container :nth-child(3) {
  grid-column: 3;
}

.container .caption {
  padding: .3em;
  background-color: rgba(0,0,0,.7);
  color: white;
  grid-column: 1 / -1;
  grid-row: 2;
}