Film

National Parks Exploration Series: Yellowstone 2011

Documentary

On March 1, 1872 President Ulysses S. Grant signed into existence the world's first national park, Yellowstone National Park. The 2.2 million acres of wilderness is the only complete mid-latitude ecosystem left on the planet.

Watch free in the UK

Not listed as free in the UK right now. You can still watch the official trailer below.