Petrified Forest National Park, Arizona: Audio Journeys

The Rainbow Forest Museum is at the southern entrance to the park. Everywhere we walk, lying on the ground are sections of ancient trees that turned to brightly colored stone beginning 225 million years ago.

Audio Journeys consist of on-location interviews with experts and the sounds of the subjects. United States explorations include national and state parks, historic sites, museums and adventures on snow, ice, camel, boats and walking.