Underwood & Underwood

Wild Buffalo, One of America’s 'First Families,' at home on a sunny slope, Yellowstone Park, U.S.A.

Cleopatra Terrace and its mirror like pools - Mammoth Hot Springs, Yellowstone Park, U.S.A.

Cleopatra Terrace and its mirror like pools - Mammoth Hot Springs, Yellowstone Park, U.S.A.

Cleopatra Terrace and its mirror like pools - Mammoth Hot Springs, Yellowstone Park, U.S.A.

How an overflowing spring begins to build a terrace of 'geyserite' deposits, Yellowstone Park, U.S.A.

How an overflowing spring begins to build a terrace of 'geyserite' deposits, Yellowstone Park, U.S.A.

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

How an overflowing spring begins to build a terrace of 'geyserite' deposits, 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.

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.

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

The most famous sight in Yellowstone Park, 'Old Faithful' Geysor in action.

The Grand Falls, Yellowstone River, Yellowstone National Park.

Golden Gate, westward, Yellowstone National Park.