Train climbing a mountain in Northern California.

Train near Mt. Shasta, California.

Men on flatbed railroad car, Williams, Indiana.

Black and white photograph of a Canadian Pacific Railway viaduct in Parry Sound, Ontario. A train can be seen crossing the viaduct.

Black and white photograph of a landslide on the Chicago, Rock Island and Pacific Railroad. Taken by Robert Merrill from a moving train.

Black and white photograph of rocks at Point Sublime, taken by Robert Merrill from a stationary train.

Black and white photograph of rocky landscape and train in motion on railroad tracks. Two engines and two passenger cars, all connected, are visible to the right of the photograph.

Black and white photograph of a train crossing a curved trestle bridge.

Black and white photograph of rocks to the east of a summit. Railroad tracks can be seen through the rocky landscape.

Black and white photograph of the Mt. Manitou Scenic Railway in Colorado. A woman, possibly Lena Merrill, is visible at a distance. A sign to the right reads The Scenic Incline to Mt. Manitou Park.

Black and white photograph of a New York City tunnel through rock along the Hudson River.

Black and white photograph of the Mount Washington Cog Railway. The railway track is centered in the frame with bushes and grass surrounding the railway.