Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction and equipment on the Hoover Dam.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Carferry transporting cars across lower Lake Mead in Arizona.

Cars lined up at the shore of lower Lake Mead waiting for the carferry.

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

Robert Annis and F.C. Angus posing at the rim of the Grand Canyon.

View of the Grand Canyon in Arizona.

Taking a break on the side of the road near the Grand Canyon in Arizona.