http://try.jquery.com/levels/4/challenges/19 When this link is clicked, show the photos for the clicked tour by traversing to it using closest and find then sliding it down by using slideToggle.

gistfile1.html

<div id="all-tours" class="links">
  <h1>Guided Tours</h1>
  <ul>
    <li class="tour usa" data-discount="199">
      <h2>New York, New York</h2>
      <span class="details">$1,899 for 7 nights</span>
      <button class="book">Book Now</button>
      <a href="#" class="see-photos">See Photos</a>
      <ul class="photos">
        <li>
          <img src="/assets/photos/paris1.jpg">
          <span>Arc de Triomphe</span>
        </li>
        <li>
          <img src="/assets/photos/paris2.jpg">
          <span>The Eiffel Tower</span>
        </li>
        <li>
          <img src="/assets/photos/paris3.jpg">
          <span>Notre Dame de Paris</span>
        </li>
      </ul>
    </li>
    <li class="tour france" data-discount="99">
      <h2>Paris, France</h2>
      <span class="details">$1,499 for 5 nights</span>
      <button class="book">Book Now</button>
      <a href="#" class="see-photos">See Photos</a>
      <ul class="photos">
        <li>
          <img src="/assets/photos/paris1.jpg">
          <span>Arc de Triomphe</span>
        </li>
        <li>
          <img src="/assets/photos/paris2.jpg">
          <span>The Eiffel Tower</span>
        </li>
        <li>
          <img src="/assets/photos/paris3.jpg">
          <span>Notre Dame de Paris</span>
        </li>
      </ul>
    </li>
    <li class="tour uk" data-discount="149">
      <h2>London, UK</h2>
      <span class="details">$2,199 for 5 nights</span>
      <button class="book">Book Now</button>
      <a href="#" class="see-photos">See Photos</a>
      <ul class="photos">
        <li>
          <img src="/assets/photos/paris1.jpg">
          <span>Arc de Triomphe</span>
        </li>
        <li>
          <img src="/assets/photos/paris2.jpg">
          <span>The Eiffel Tower</span>
        </li>
        <li>
          <img src="/assets/photos/paris3.jpg">
          <span>Notre Dame de Paris</span>
        </li>
      </ul>
    </li>
  </ul>
</div>

$(document).ready(function() {
  $(".see-photos").on("click", function() {
    $(this).closest('.tour').find('.photos').slideToggle()
  });
});