At the bottom of South America, where the Atlantic and Pacific Oceans collide, is Patagonia, one of the last great wild Edens on Earth. Journey to this breathtaking subantarctic region and its crown jewel-Tierra del Fuego-a beautifully desolate island at its most southern tip. With stunning footage, National Geographic offers a wondrous glimpse into the pristine haven that is Patagonia.

National Geographic Explorer investigates the execution-style murder of six mountain gorillas in Virunga National Park. Their search reveals corruption and how Virunga has become one of the most dangerous places on earth.

The Serengeti in northern Tanzania is one of the world's last great wildlife refuges, teeming with crocs, leopards, cheetahs, and one of the biggest lion populations in Africa-with approximately 3,500 lions in 300 prides. But one pride looms large in the Serengeti kingdom: a single dynasty ruling the plains to which hundreds of lions trace their roots. Experience the Serengeti through their eyes and discover how this pride is exploding in size.

It was once known as "the place where Noah left his Ark": 1,500 square miles of lush floodplains in central Mozambique, packed with wild animals. But 15 years of civil war has taken a heavy toll-and many species have been almost completely wiped out. Journey with National Geographic to Mozambique's Gorongosa National Park and discover what is being done to bring this African oasis back to its former glory.

National Geographic presents a comprehensive view of the spectacular California coastal area known as Big Sur. Fly with the California condors and capture the panoramic view of Big Sur's many topside layers. Dive with California's sea otters to investigate life below the waves. Then, follow the stealthy mountain lions and see how the scavengers, the key-stone species and this top predator are all critical contributors to Big Sur's unique habitat.

America's Great Plains were once a vibrant grassland ecosystem, akin to the great savannahs of Africa. Here, a mere 200 years ago, Lewis and Clark stepped onto this fertile landscape and were awestruck by what they saw-herds of bison, packs of wolves, grizzly bears, prairie dogs and more. Since Lewis and Clark's time, many of these iconic prairie creatures have all but disappeared. Now, one of the most ambitious conservation projects in American history is underway to create a thriving three million acre wildlife reserve that will restore "America's Serengeti." Filmed over 2 years in stunning high-definition, American Serengeti chronicles the massive restoration project and, through CGI, will fast forward to the future when vast herds of American wildlife will roam the plains once again. Narrated by Tom Selleck.