Sunrise at Point Sublime, North Rim Grand Canyon, AZ.

Sunrise at Point Imperial, North Rim Grand Canyon, AZ.

Sunrise at Point Imperial, North Rim Grand Canyon, AZ.

Sunrise at Angel's Window, North Rim Grand Canyon National Park, AZ.

Sunrise at Point Imperial, North Rim Grand Canyon, AZ.

Perched on the edge of Grand Canyon, a surprising stone tower celebrates ancient mysteries of the Southwest.

Perched on the edge of Grand Canyon, a surprising stone tower celebrates ancient mysteries of the Southwest.

Storm clouds rolling in over the Grand Canyon, from Yavapai Point along the South Rim.

Afternoon play of light and shadows deep inside the Grand Canyon from the South Rim.

Storm moving in over the South Rim of Grand Canyon.

Last sunlight and Full Moon rise over the South Rim from Angels Window at the North Rim of Grand Canyon.

Pre sunset over Grand Canyon from Point Sublime, North Rim.

Looking south from Point Sublime/ North Rim towards the South Rim of Grand Canyon with the San Francisco Peaks on the horizon.

Sunrise over Granite Gorge / Grand Canyon from Point Sublime, AZ.

Sunset over Gand Canyon from Point Sublime on the North Rim.

Another Horseshoe Bend along the Colorado River, East Grand Canyon on the Navajo Reservation, AZ.

Looking upstream towards Nankoweap high above the Colorado River, East Grand Canyon on the Navajo Reservation, AZ.

High above the Colorado River below Nankoweap looking towards the confluence with the Little Colorado River, East Grand Canyon, AZ.

Calm stretch of the Colorado River before the next rapid during a 8 day white water rafting trip through the Grand Canyon.