Rainbow Bridge, Utah.

Rainbow Bridge, Utah.

Annis taking a break with the horses on the trail to Rainbow Bridge in Utah.

Following a trail through the mountains on horseback to Rainbow Bridge in Utah.

Following a trail through the mountains on horseback to Rainbow Bridge in Utah.

Standing near concretions in Utah.

Concretion, or round stones in Utah.

Following a trail through the mountains on horseback to Rainbow Bridge in Utah.

Little Colorado River Bridge at Cameron, Arizona.

View of the Grand Canyon in Arizona.

View of Grand Canyon from the South Rim looking to the north toward Bright Angel Canyon, Arizona.

View of Grand Canyon from the South Rim looking to the north toward Bright Angel Canyon, Arizona.