Initial Point of Boundary Between U.S. and Mexico
Imperial Beach, CA
Culture
The Initial Point of Boundary Between U.S. and Mexico is the westernmost boundary marker on the international boundary between the United States and Mexico and as such has since its erection marked the southwestern corner of the Continental United States. According to the 1848 Treaty of Guadalupe Hidalgo, the initial border point is set as one marine league south of the southernmost point of San Diego Bay, and the border proceeds in a straight line towards the confluence of the Colorado River and the Gila River.
From Wikipedia, CC BY-SA 4.0
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