Argentina's Iberá National Park is the largest protected wetland area in South America. The place was once home to a stunning array of wildlife, but throughout the early part of the 20th century, much of that wildlife was hunted to near extinction. That left this wild and remote place empty of many of the animals that once called it home. Now, a dedicated group of conservationists are working to reintroduce those creatures in an effort to restore the area to its former pristine glory. Those efforts aren't easy and they will take a lot of time, but as you'll see in this video, they are already beginning to pay off.