Why is there a line between my linked images - html

Question

There is a thin horizontal line between my linked images, I'm not sure what could be causing this or how to fix it. Any ideas?
.hvr-bounce-to-right {
display: inline-block;
vertical-align: middle;
-webkit-transform: perspective(1px) translateZ(0);
transform: perspective(1px) translateZ(0);
box-shadow: 0 0 1px transparent;
position: relative;
-webkit-transition-property: color;
transition-property: color;
-webkit-transition-duration: 0.5s;
transition-duration: 0.5s;
margin: 20px;
}
.cowalign {
text-align: center;
}
.cowalign img {
vertical-align: middle;
width: 350px;
}
.imgDescription {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 286px;
color: #fff;
visibility: hidden;
opacity: 0;
z-index: 1;
text-align: center;
/*remove comment if you want a gradual transition between states
-webkit-transition: visibility opacity 0.2s;
*/
}
.bgcolor {
max-width: 1300px;
background-color: #E5E5E5;
margin: auto;
}
.container {
background-color: #ffffff;
margin-right: auto;
margin-left: auto;
padding-right: 3%;
padding-left: 3%;
padding-bottom: 50px;
}
.logowordmark img {
float: left;
padding-left: 40px;
padding-top: 40px;
}
#navigation {
float: right;
padding-right: 40px;
padding-top: 40px
}
#navigation li {
display: inline-block;
vertical-align: middle;
margin-left: 20px;
text-transform: uppercase;
font-family: "mr-eaves-modern", sans-serif;
font-size: 12px;
font-weight: 100;
letter-spacing: normal;
color: #999999;
}
.heading {
clear: both;
margin: auto;
max-width: 750px;
padding-top: 50px;
margin-bottom: 50px;
padding-right: 20px;
padding-left: 20px;
}
#ourwork {
text-transform: uppercase;
font-weight: bold;
letter-spacing: 2px;
margin: auto;
font-size: 40px;
line-height: 40px;
}
.titlework {
font-size: 25px;
letter-spacing: 2px;
}
.descriptionwork {
font-size: 12px;
letter-spacing: 3px;
color: #21A4B9;
}
#ourwork span {
color: #21A4B9;
}
#ourworksubtext {
color: #999999;
}
.hvr-bounce-to-right:hover .imgDescription {
visibility: visible;
opacity: 1;
transition-delay: 0.2s;
}
.hvr-bounce-to-right:before {
content: "";
position: absolute;
z-index: 1;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: #2D2D2D;
-webkit-transform: scaleX(0);
transform: scaleX(0);
-webkit-transform-origin: 0 50%;
transform-origin: 0 50%;
-webkit-transition-property: transform;
transition-property: transform;
-webkit-transition-duration: 0.5s;
transition-duration: 0.5s;
-webkit-transition-timing-function: ease-out;
transition-timing-function: ease-out;
opacity: 0.95;
}
.hvr-bounce-to-right:hover,
.hvr-bounce-to-right:focus,
.hvr-bounce-to-right:active {
color: white;
}
.hvr-bounce-to-right:hover:before,
.hvr-bounce-to-right:focus:before,
.hvr-bounce-to-right:active:before {
-webkit-transform: scaleX(1);
transform: scaleX(1);
-webkit-transition-timing-function: cubic-bezier(0.52, 1.64, 0.37, 0.66);
transition-timing-function: cubic-bezier(0.52, 1.64, 0.37, 0.66);
}
<div class="cowalign">
<a href="#">
<div class="hvr-bounce-to-right">
<div class="imgWrap">
<div class="imgDescription"><span class="titlework">Deadeye BBQ</span>
<br>
<span class="descriptionwork">Website/Mobile/Poster Design</span>
</div>
<img src="images/001-MacBook-Silverlarge.jpg" alt="cow">
</div>
</div>
</a>
<a href="#">
<div class="hvr-bounce-to-right">
<div class="imgWrap">
<div class="imgDescription"><span class="titlework">Jellyfish Evening</span>
<br>
<span class="descriptionwork"> Poster Design</span>
</div>
<img src="images/jellyfishevening.jpg" alt="cow">
</div>
</div>
</a>
<div class="cowalign">
<div class="hvr-bounce-to-right">
<div class="imgWrap">
<div class="imgDescription"><span class="titlework">Aerial Aid</span>
<br>
<span class="descriptionwork"> Logo Design</span>
</div>
<img src="images/aalogowork.jpg" alt="cow">
</div>
</div>
<div class="hvr-bounce-to-right">
<div class="imgWrap">
<div class="imgDescription"><span class="titlework">Dead, Dumb Fish</span>
<br>
<span class="descriptionwork">Poster Design</span>
</div>
<img src="images/fishwork.jpg" alt="cow">
</div>
</div>
</div>
</div>
</div>

Answer 1

It's because you haven't taken away the styling for the <a>wrapping the elements. Hence the default underline for the <a>is showing. The <a> directly after <div class="cowalign">
Add something like .cowalign a { text-decoration: none; } in the CSS

Answer 2

.cowalign a {
text-decoration: none;
}