A Mountain of 'Petrified Water'- Pulpit Terrace and Mammoth Spring Hotel, Yellowstone Park, U.S.A.

A Mountain of 'Petrified Water'- Pulpit Terrace and Mammoth Spring Hotel, Yellowstone Park, U.S.A.

A Mountain of 'Petrified Water'- Pulpit Terrace and Mammoth Spring Hotel, Yellowstone Park, U.S.A.

Fort Yellowstone, among the mountains, headquarters of U.S. Troops guarding Yellowstone Park, U.S.A.

Fort Yellowstone, among the mountains, headquarters of U.S. Troops guarding Yellowstone Park, U.S.A.

Fort Yellowstone, among the mountains, headquarters of U.S. Troops guarding Yellowstone Park, U.S.A.

Fort Yellowstone, among the mountains, headquarters of U.S. Troops guarding Yellowstone Park, U.S.A.

From Yellowstone Park N. through its gateway over Gardiner to Gallatin Range (left) and Buffalo Plateau.

From Yellowstone Park N. through its gateway over Gardiner to Gallatin Range (left) and Buffalo Plateau.

From Yellowstone Park N. through its gateway over Gardiner to Gallatin Range (left) and Buffalo Plateau.

Six-horse tally-ho leaving mountain walled Gardiner for trip through Yellowstone Park, U.S.A.

Six-horse tally-ho leaving mountain walled Gardiner for trip through Yellowstone Park, U.S.A.

Six-horse tally-ho leaving mountain walled Gardiner for trip through Yellowstone Park, U.S.A.

Six-horse tally-ho leaving mountain walled Gardiner for trip through Yellowstone Park, U.S.A.

Six-horse tally-ho leaving mountain walled Gardiner for trip through Yellowstone Park, U.S.A.

Fort Yellowstone Cavalry, the U.S. soldiers who guard the great National Park.

Eagle Nest Rock, Yellowstone National Park, where the King of Birds rear their young.

Leaf Form In Limestone. 2nd View.

Leaf Form In Limestone. 2nd View.

Leaf Form In Limestone. 1st View.

Leaf Form In Limestone. 2nd View.

Crater, 3rd view.

Crater, 3rd view.

Crater, 2nd view.

Snowy Cascades, Lime Formation.

Crater, 1st view.

Grotto Spring.

Chimmney Point.

Diana's Baths.

Upper Basins.