Gigantic Sequoias, waterfalls among the world's highest, sparking lakes and sweeping meadows create a natural treasure. This program presents a privileged insider's view of Yosemite, a mecca for backpackers, home to 300 species of wildlife, and the inspiration for the conservation movement. Experience all of Yosemite's wonders, including the granite monoliths El Capitan and Half Dome, learn about its fascinating history, and view the magnificent landscape through the eyes of photographer Ansel Adams.

From grizzly bears in Katmai National Park in Alaska to rattlesnakes in Montezuma's Castle National Monument in Arizona, take an unforgettable walk on the wild side. This program transports you by land, sea, and sky to parklands across the country for close-up encounters with creatures of all shapes and sizes, including the pronghorn, among the fastest-moving land mammals, and the manatee.

Meet the unsung heroes of America's National Parks, the dedicated men and women who work behind the scenes, often risking their lives to preserve national monuments, conserve America's unspoiled beauty, and even anticipate the forces of nature. From rappelling down the towering granite faces of Mount Rushmore to executing a prescribed burn in the Grand Canyon and plowing the treacherous Going-to-the-Sun Road in Glacier National Park, their job is riddled with danger, challenges, and rewards.