America's National Parks (2015)

The Olympic peninsula is home to one of North America's most diverse parks.

Yosemite National Park in the Sierra Nevada Mountains, is home to giant trees and protected by Presidential decree.

The Everlands are home to thousands of species, a puzzle of different habitats all contributing to a remarkable biodiversity.

The Gate of the Arctic national park in Northern Alaska is one of the last untamed places on Earth.

A wilderness jewel of vast forests and yawning valleys, Yellowstone is home to large bison herds, wolf packs, and generations of grizzly bears.

Sculpted by nature over millions of years, the Grand Canyon may be America's best-known natural wonder, but few have seen beyond its north side.

Visiting one of America's newest National Parks, the Saguaro Desert in Arizona.

The Great Smoky Mountains National Park boasts vast forests, lush meadows and a kaleidoscope of vibrant and mystical autumnal colours.