Visit Boundary Monument #258, San Diego/Tijuana, US & Mexico

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In 1848, the U.S.-Mexican War ended with the signing of the Treaty of Guadalupe Hidalgo. The treaty stipulated that Mexico relinquish 1.2 million square miles of its territory to the United States in return for $15 million. 53 boundary monuments were erected with #1 overlooking the Pacific Ocean in what today is Border Field State Park. From 1892 to 1894, a commision began to place 258 boundary monuments across 689 miles of border. They started in El Paso, Texas and designated it boundary marker #1. As a consequence, the last marker, once considered the initial point at the Pacific Ocean, was re-numbered 258. Boundary marker #1 was made of Italian marble and stretched 14 feet high. The Commission ordered it from a New York firm called “At the Sign of the Quadrant” and waited for it to be delivered by ship. Once the marble obelisk arrived, the Commission purportedly placed a time capsule underneath. In particular, No. 258 at the Pacific Ocean was redesigned in 2011 so that the obelisk stood exclusively on the Mexican side and was cut off to Americans by a thick mesh fence.

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