The top observation area covered by plexiglass. Imagine the feeling looking out of that while the plane is airborne.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/80441498@N00">Venkat Mangudi</a>
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/venkatmangudi/25376399563/">P3221940</a>