A throng of people on a bridge by a rock wall and trees are looking over and into an enclosure with two giraffes, both tall enough for their heads to peer over the top of the bridge.  
zoo goers watching two giraffes in the pen
Two giraffes greet people that are standing on a bridge near their pen.
Two giraffes in the zoo looking at the tourists. 
Two giraffes inside an enclosure with people looking at them.