Up the Colorado River from Pyrite Point to Zoroaster Tower.

Up the Colorado River from Pyrite Point to Zoroaster Tower.

Up the Colorado River from Pyrite Point to Zoroaster Tower.

Down the Granite Gorge of the Colorado (1200 ft. deep) from Pyrites Point.

Beside the Colorado - looking up to Zoroaster Tower from Pipe Creek.

"The sinuous Colarado, yellow as the Tiber" - north from Bissell's Point.

A mighty red rift in the earth - Bright Angel Canon from O'Neil's Point.

The tourist's view - Sentinel Point and Walcott Peak from Bright Angel Hotel.

The Guardian Giants - work of erosion on the Rim.

A mightly sentinel in a trackless waste - Zoroaster Tower.

Crossing the Lower Plateau towards the Colorado River.

Rounding Cape Horn on the Bright Angel Trail.

Zigzagging down Red Canyon Trail.

In the limestone halfway down Grand View Trail(2).

In the limestone halfway down Grand View Trail.

The Serpentine Fault (asbestos deposit) from the south cliff of the Colorado River.

A Pinion tree which plants its nuts 4000 feet below, Rowe's Point.

North from Bissell's Point - looking up the Colorado River.

Gazing into a yawning chasm 5000 feet deep, Moran's Point.

The Castles, from head of Hance's Cove.

"The sinuous Colarado, yellow as the Tiber" - north from Bissell's Point.

An eroded sentinel - survivor of the primeval flood.

A mightly red rift in the earth - Bright Angel Canon from O'Neil's Point.

Looking down upon Ayer's Peak, a mountain 600 feet high.

Rocks in the Canon de Chelle--950 ft.

Steam-boat on the Colorado River in Arizona.

Ruins near the Great Casa Grande, Arizona.

Ruins near the Great Casa Grande, Arizona.

The Colorado river and Ehrenburg, Arizona.

The Colorado river and Ehrenburg, Arizona.