SOURCE

<div class='pin'></div>
<div class='pulse'></div>

body,
html {
  height: 100%;
}
body {
  background: #2f2f2f;
}
.pin {
  width: 30px;
  height: 30px;
  border-radius: 50% 50% 50% 0;
  background: #89849b;
  position: absolute;
  transform: rotate(-45deg);
  left: 50%;
  top: 50%;
  margin: -20px 0 0 -20px;
  animation-name: bounce;
  animation-fill-mode: both;
  animation-duration: 1s;
}
.pin:after {
  content: '';
  width: 14px;
  height: 14px;
  margin: 8px 0 0 8px;
  background: #2f2f2f;
  position: absolute;
  border-radius: 50%;
}
.pulse {
  background: rgba(0,0,0,0.2);
  border-radius: 50%;
  height: 14px;
  width: 14px;
  position: absolute;
  left: 50%;
  top: 50%;
  margin: 11px 0px 0px -12px;
  transform: rotateX(55deg);
  z-index: -2;
}
.pulse:after {
  content: "";
  border-radius: 50%;
  height: 40px;
  width: 40px;
  position: absolute;
  margin: -13px 0 0 -13px;
  animation: pulsate 1s ease-out;
  animation-iteration-count: infinite;
  opacity: 0;
  box-shadow: 0 0 1px 2px #89849b;
  animation-delay: 1.1s;
}
@-moz-keyframes pulsate {
  0% {
    transform: scale(0.1, 0.1);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: scale(1.2, 1.2);
    opacity: 0;
  }
}
@-webkit-keyframes pulsate {
  0% {
    transform: scale(0.1, 0.1);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: scale(1.2, 1.2);
    opacity: 0;
  }
}
@-o-keyframes pulsate {
  0% {
    transform: scale(0.1, 0.1);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: scale(1.2, 1.2);
    opacity: 0;
  }
}
@keyframes pulsate {
  0% {
    transform: scale(0.1, 0.1);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: scale(1.2, 1.2);
    opacity: 0;
  }
}
@-moz-keyframes bounce {
  0% {
    opacity: 0;
    transform: translateY(-2000px) rotate(-45deg);
  }
  60% {
    opacity: 1;
    transform: translateY(30px) rotate(-45deg);
  }
  80% {
    transform: translateY(-10px) rotate(-45deg);
  }
  100% {
    transform: translateY(0) rotate(-45deg);
  }
}
@-webkit-keyframes bounce {
  0% {
    opacity: 0;
    transform: translateY(-2000px) rotate(-45deg);
  }
  60% {
    opacity: 1;
    transform: translateY(30px) rotate(-45deg);
  }
  80% {
    transform: translateY(-10px) rotate(-45deg);
  }
  100% {
    transform: translateY(0) rotate(-45deg);
  }
}
@-o-keyframes bounce {
  0% {
    opacity: 0;
    transform: translateY(-2000px) rotate(-45deg);
  }
  60% {
    opacity: 1;
    transform: translateY(30px) rotate(-45deg);
  }
  80% {
    transform: translateY(-10px) rotate(-45deg);
  }
  100% {
    transform: translateY(0) rotate(-45deg);
  }
}
@keyframes bounce {
  0% {
    opacity: 0;
    transform: translateY(-2000px) rotate(-45deg);
  }
  60% {
    opacity: 1;
    transform: translateY(30px) rotate(-45deg);
  }
  80% {
    transform: translateY(-10px) rotate(-45deg);
  }
  100% {
    transform: translateY(0) rotate(-45deg);
  }
}