Huell goes back in time and visits with John Muir at Yosemite National Park. Muir was America's most famous and influential naturalist and conservationist who is often called the father of our National Parks System. In 1892, he founded the Sierra Club to protect the newly created Yosemite National Park. Through his writing and actions, he taught the people of his time, and ours, the importance of experiencing and protecting our natural heritage.