Can't find my mistake here


#1

I keep getting error "Oops, try again. Add a <div class="thumbnail">..</div>"

<!DOCTYPE html>
<html>

  <head>
    <link href="http://s3.amazonaws.com/codecademy-content/courses/ltp/css/shift.css" rel="stylesheet">
    
    <link rel="stylesheet" href="http://s3.amazonaws.com/codecademy-content/courses/ltp/css/bootstrap.css">
    <link rel="stylesheet" href="main.css">
    
  </head>

  <body>
    <div class="nav">
      <div class="container">
        <ul class="pull-left">
          <li><a href="#">Name</a></li>
          <li><a href="#">Browse</a></li>
        </ul>
        <ul class="pull-right">
          <li><a href="#">Sign Up</a></li>
          <li><a href="#">Log In</a></li>
          <li><a href="#">Help</a></li>
        </ul>
      </div>
    </div>

    <div class="jumbotron">
      <div class="container">
        <h1>Find a place to stay.</h1>
        <p>Rent from people in over 34,000 cities and 192 countries.</p>
        <a href="#">Learn More</a>
      </div>
    </div> 

<div class="neighborhood-guides">
  <div class="container">
    <h2>Neighborhood Guides</h2>
    <p>Not sure where to stay? We've created neighborhood guides for cites all around the world.</p>
    
      <div class="row">
      
        <div class="col-md-4">
        
          <div class="thumbnail">
            <img src="http://goo.gl/0sX3jq">
          </div>
          <div class="thumbnail">
            <img src="http://goo.gl/an2HXY">
          </div>
            
            </div>
            
        </div>
        
          <div class="col-md-4">
            
            <div class="thumbnail">
              <img src="http://goo.gl/Av1pac">
            </div>
            <div class="thumbnail">
            <img src="http://goo.gl/vw45v1">
            </div>
          
          </div>
          
            <div class="col-md-4">
            
              <div class="thumbnail">
               <img src="http://goo.gl/0Kd7UO">
              </div>    
            
          </div>
          
        </div>
      </div>
    </div>
  </div>

    <div class="learn-more">
	  <div class="container">
		<div class="row">
		   <div class="col-md-4">
			<h3>Travel</h3>
			<p>From apartments and rooms to treehouses and boats: stay in unique spaces in 192 countries.</p>
			<p><a href="#">See how to travel on Airbnb</a></p>
	      </div>
		  
		  <div>
			<h3>Host</h3>
			<p>Renting out your unused space could pay your bills or fund your next vacation.</p>
	        <p><a href="#">Learn more about hosting</a></p>
		  </div>
		
		<div>
			<h3>Trust and Safety</h3>
			<p>From Verified ID to our worldwide customer support team, we've got your back.</p>
			<p><a href="#">Learn about trust at Airbnb</a></p>
		  </div>
	    </div>
	  </div>
	</div>
  </body>
</html>

#2

yeah, that happened to me


#3

After the first column you have three </div> tags. One closes the thumbnail -- that's good, one closes the column -- also good, and one closes the row -- that's bad. You don't want to close your row until after the third and final column is closed.