Lower Falls of the Yellowstone River, Wyoming.

Spokane Falls in Spokane, Washington.

Spokane Falls in Spokane, Washington.

Bridge and Spokane Falls in Spokane, Washington.

Black and white photograph of a person standing on a mountaintop next to several trees. Mountains, a valley, and a waterfall are visible in the background.

Black and white lantern slide of the Yellowstone Lower Falls taken from the Uncle Tom Trail.

Black and white photograph of Tahquamenon Falls from a point on a hill. People are visible below the photographer walking along the shore of the lake and looking at the waterfall.

Black and white photograph of Tahquamenon Falls from below. A group of people are visible in the bottom of the frame looking at the waterfall.

Black and white photograph of a waterfall among boulders surrounded by trees. A wooden bridge is visible in the distance.

Black and white photograph of a narrow waterfall on a rocky hillside. Trees are visible on either side of the cascade.

Black and white photograph of a rocky waterfall surrounded by trees.

Niagara Falls from above and below the Canadian Falls, and from above and below the American Falls.