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Monument No. 258, situated between the western boundaries of the U.S. and Mexico.
Old Monument No. 16, looking east, was built in the early 1850's to mark the U.S. - Mexico border. Courtesy National Archives (76-OM-1-144)
An 1894 photograph shows the southeast view of Monument No. 258, also known as Old Monument No. 1, after renovation and the erection of a protective fence.
Images of monuments 185 on the U.S.-Mexico border.
Images of monuments 2 on the U.S.-Mexico border.
International Monument No. 163, located in Organ Pipe Cactus National Monument in Arizona.
Monument No. 210 is located a few miles east of Gordon's Well, Imperial County, California. Courtesy David Taylor, "Border Monument No. 210, N 32° 42.352' W 114° 54.596, 2009."