Black and white lantern slide of the Tasquillo bridge.

Black and white lantern slide of the Cabin John Bridge, also known as the Union Arch Bridge, in Cabin John, Maryland.

Black and white lantern slide of heavily laden canal boats on the Grand Canal in Tientsin (Tianjin), China. Several large buildings are visible in the background.

Black and white lantern slide of the Grand Canal passing under a railway bridge near the Grand Canal Improvement Board office in Tientsin (Tianjin), China. Boat traffic passes under the bridge.

Black and white lantern slide of the Grand Canal passing under a railway bridge.

Black and white lantern slide of a railroad bridge taken from below.

Black and white lantern slide of a railroad bridge crossing the Yellow River in China.

Black and white lantern slide of a railroad bridge entrance. A sign on top of the bridge reads "Erbaut 1909-1912, Maschinenfabrik Augsburg-Nurnberg A.C. Werk Gustavsberg."

Black and white lantern slide of a group of soldiers standing on top of a stone bridge in China looking down at an overturned cart on the path below.

Black and white lantern slide of a stone bridge with three arches crossing a river in China. A crowd of people and several wagons are visible aross the bridge, with a few on the bank of the river below.

Black and white photograph of a Lena Merrill standing next to a river with bridges and buildings visible in the background.

Black and white photograph of a Chinese man standing next to a tide gauge house and pier. Another person is visible standing on top of the pier. Photograph was taken by Robert Merrill in the Chinese coastal resort area of Beidaihe Qu.

Black and white photograph of 13 people standing and fishing on a wooden bridge. Rock formations and a brick wall are visible behind the bridge. "Devil's Hole, Bermuda Fine Fishing." is written on the bottom of the image.

Black and white photograph of a stone bridge over a river in front of a group of building. A horse-drawn carriage is crossing the bridge. "Harrington Sound Outlet, Bermuda." is written on the bottom of the image.

Black and white photograph of a steel bridge over the Colorado River in Yuma, Arizona. Lettering on the bridge reads "OCEAN - TO - OCEAN HIGHWAY YUMA.".

Black and white photograph of a car parked on a bridge over a river. A man and a woman are visible standing in front of the car.

Black and white photograph of a partially frozen river in the middle of a city. Buildings are visible on both sides of the river, and there is a bridge across the river in the distance.

Black and white photograph of railway tracks going up a mountainside. A bridge over the tracks is visible.

Black and white photograph of a metal bridge over a dried river bed behind a man-made dam. A building with an American flag raised is visible behind the bridge and an automobile can be seen crossing the bridge.

Black and white photograph of a rocky chasm with a wooden bridge path on the left side of the image between a rock wall and boulders.

Black and white photograph of two women standing next to a chasm river. A rock wall is behind them. A wooden bridge is visible over the river where the chasm narrows.

Black and white photograph of a narrow chasm. A bridge path runs along the rock wall on the right side of the image. Two people are visible on the bridge.

Black and white photograph of a metal bridge. People are visible walking along the side of the bridge, and automobiles are driving in the middle of the bridge.

Black and white photograph of a cement bridge over a rocky river. The image is taken from river level, and a man is visible standing among the boulders of the river. Two people can be seen standing on the bridge.