A CodePen by Emanual Jade. 3D Nav Cube - Inspired by snowbird.com mobile site. This is meant to be used as a responsive case for smaller mobile devices. This is a quick and dirty test and not ready for use in production.

index.html

<div class="page">
  
  <div class="cube-container">
    <div class="cube nav-cube">
      <div class="search">
        <p>Search</p>
        <input type="text"/>
      </div>
      <ul>
        <li><a href="">yachts</a></li>
        <li><a href="">crew</a></li>
        <li><a href="" class="row-end">charters</a></li>
        <li><a href="">events</a></li>
        <li><a href="">jobs</a></li>
        <li><a href="" class="row-end">about</a></li>
        <li><a href="">partners</a></li>
        <li><a href="">staff</a></li>
        <li><a href="" class="row-end">locations</a></li>
      </ul>
    </div>
  </div>
  
  <div class="cube-container">
    <div class="cube weather-cube">
      <h2>Sunny in Vancouver</h2>
    </div>
  </div>
  
  <div class="main-content">
    <div class="menu">
      <div class="border">
        <div class="blue"></div>
      </div>
      <a href="#" class="nav-toggle closed" data-cube="close-switch">
        <span>+</span>
      </a>
      <div class="logo">cardero</div>
      <a href="" class="weather-toggle">
        <img src="http://s.cdpn.io/49110/clear_night@2x.png" />
      </a>
    </div>
    
    <div class="hero">
      <img src="http://s.cdpn.io/49110/big.jpg" />
    </div>
    
  </div>
</div>

script.js

$(document).ready(function(){
  
  $('body').on('click', '.nav-toggle.closed', function(e){
    var pageDiv = $('.page');
    var navCube = $('.nav-cube');
    var closeSwitch = $('a[data-cube=close-switch]');
    
    closeSwitch.addClass('opened');
    closeSwitch.removeClass('closed');
    closeSwitch.data('cube-target', '.nav-cube');
    
    
    pageDiv.addClass('open');
    navCube.addClass('incoming');
    e.preventDefault();
  });
  $('body').on('click', '.nav-toggle.opened', function(){
    var pageDiv = $('.page');
    var navCubeClass = $(this).data('cube-target');
    $(this).removeClass('opened').addClass('closed');
    var navCube = $(navCubeClass);
    pageDiv.removeClass('open');
    navCube.removeClass('incoming'); 
  });
  
   $('.weather-toggle').on('click', function(e){
      var pageDiv = $('.page');
      var navCube = $('.weather-cube');
      
      var closeSwitch = $('a[data-cube=close-switch]');
      closeSwitch.addClass('opened');
      closeSwitch.removeClass('closed');
      closeSwitch.data('cube-target', '.weather-cube');
     
      pageDiv.addClass('open');
      navCube.addClass('incoming');
      e.preventDefault(); 
    });
  
});

style.css

body{
  margin: 0;
  padding: 0;
  font-family: helvetica;
  background: #000;
}
.cube-container{
  -webkit-perspective: 640px;
}

.cube{
  position: absolute;
  width: 100%;
  height: 200px;
  background: #fff;
  -webkit-transform: translateY(-200px) rotateX(90deg);
  -webkit-transform-origin: 50% 200px;
  -webkit-transition: -webkit-transform .6s cubic-bezier(0.165,0.840,0.440,1.000);
  -webkit-backface-visibility: hidden;
}
.incoming.cube{ 
  display: block;
  -webkit-transform: translateY(0px) rotateX(0deg);
  -webkit-transform-origin: 50% 200px;
  -webkit-transition: -webkit-transform .6s cubic-bezier(0.165,0.840,0.440,1.000);
  -webkit-backface-visibility: hidden;
}
.weather-cube{
  text-align: center;
  background: #fff;
}
.weather-cube h2{
  line-height: 200px;
  maring: 0;
  padding: 0;
}
.nav-cube .search input{
  width: 190px;
  height: 25px;
  border-radius: 7px;
  position: relative;
  top: -1px;
  left: 20px;
  border: none;
  background: rgb(230, 247, 215);
}
.nav-cube .search{
  background: #b6d99f;
  height: 50px;
  box-sizing: border-box;
  padding-left: 15px;
  overflow: hidden;
}
.nav-cube .search p{
  color: #fff;
  font-size: 16px;
  line-height: 50px;
  margin: 0;
  display: inline-block;
  font-weight: normal;
}
.nav-cube ul{
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-cube ul li{
  position: relative;
  float: left;
  width: 33.333%;
  height: 50px;
  margin: 0;
  padding: 0;
}
.nav-cube ul li a{
  text-align: center;
  line-height: 50px;
  display: block;
  font-size: 12px;
  font-weight: bold;
  border-bottom: 1px solid #b0b0b0;
  border-right: 1px solid #b0b0b0;
  box-sizing: border-box;
  text-transform: uppercase;
  text-decoration: none;
}
.nav-cube ul li a.row-end{
  border-right: 0;
}
.main-content{
  width: 100%;
  background: #EBEBEB;
  min-height: 900px;
  position: absolute;
  -webkit-transition: -webkit-transform .6s cubic-bezier(0.165,0.840,0.440,1.000);
  -webkit-backface-visibility: hidden;
}
.open .main-content{
  -webkit-transform: translateY(200px);
}


.menu{
  background: #fff;
  height: 50px;
  padding: 0;
  box-shadow: 0px 1px 2px rgba(0,0,0,0.3);
  position: relative;
  z-index: 22;
}
.menu .logo{
  text-align: center;
  line-height: 45px;
}
.menu .border {
  background: #b6d99f;
}
.menu .border .blue {
  width: 50%;
  height: 4px;
  background: #7fcde8;
  border-right: 1px solid #fff;
}
.menu .nav-toggle{
  position: absolute;
  display: block;
  top: 6px;
  width: 40px;
  height: 40px;
  z-index: 2;
  font-size: 30px;
  font-weight: bold;
  text-decoration: none;
  color: #464646;
}

.menu .nav-toggle span {
  display: block;
  width: 40px;
  height: 40px;
  -webkit-transition: -webkit-transform .5s ease-out;
  text-align: center;
  -webkit-backface-visibility: hidden;
}
.open .menu .nav-toggle span{
  -webkit-transform: rotate(45deg);
  -webkit-backface-visibility: hidden;
}

.menu .weather-toggle{
  position: absolute;
  right: 0;
  display: block;
  top: 6px;
  width: 40px;
  height: 40px;
  z-index: 2;
  opacity: 1;
  -webkit-transition: opacity .6s;
}
.menu .weather-toggle img{
  position: relative;
  top: 4px;
  with: 32px;
  height: 32px;
}
.open .weather-toggle{
  opacity: 0;
}

a:visited{
  color: #464646;  
}
a:active{
  color: rgb(80, 138, 192);
}

.hero{
  position: relative;
}
.hero img{
  width: 100%;
  height: auto;
}