Black and white photograph of the side of a mountain in the distance with a hillside in the foreground of the image.

Black and white lantern slide of the Temple of Heaven in Beijing, China's Forbidden City. The image shows several temple buildings behind an ornate marble railing.

Black and white photograph aerial view of Campeche, Mexico

Black and white photograph of Arch Rock on Mackinac Island, Michigan, Two men and one woman are seated atop the rock.

Black and white photograph of the Arco Felice near Pozzuoli. A man in a horse-drawn cart is visible in the foreground with the Arco Filice arch in the background.

Black and white lantern slide of the Casa Grande Ruins National Monument.

Black and white lantern slide of the Grand Canyon from Grand View Point.

Black and white lantern slide of the Grand Canyon, taken from Hopi Point.

Black and white lantern slide of the Grand Canyon, taken from Yaki Point. A woman leans against a railing at the precipice.

Black and white lantern slide of the Grand Canyon's Upper Bright Angel Trail.

Black and white lantern slide of Robert Merrill standing next to a large Joshua Tree in the desert.

Black and white lantern slide of Robert Merrill standing on a petrified agate tree in the Petrified Forest National Park.

Black and white lantern slide of the Roosevelt Dam.

Black and white lantern slide of a variety of cacti in the desert at Saguaro National Park.

Black and white lantern slide of cliff dwelling ruins at Tonto National Monument.

Black and white lantern slide of Indigenous dancers in regalia, taken at the Grand Canyon.

Black and white photograph of the falls from Artist's Point at Yellowstone National Park (mile 17601).

Black and white photograph of a river chasm.

Black and white photograph of a narrow river chasm.

Black and white photograph of three people, one man and two women, standing on a rock formation across from a rock formation set into a cliff face.

Black and white photograph of a man sitting in a boat on a river in a chasm.

Black and white photograph of three people, two women and a man, standing on tiered ledge of a cliff face on one side of a river chasm.

Black and white photograph of three people, two women and a man, standing in front of a rock cliff face. Trees are visible on top of the rock wall and next to the three people at ground level.

Black and white photograph of a river in front of a rock cliff face.