US–Mexico_International_Boundary_Monument_No._1.jpg

The easternmost boundary marker along the Mexico–United States border, just west of the Rio Grande. The photograph is taken from the northeastern corner, in the United States. The northern side of the obelisk contains a plaque in English; the eastern side of the obelisks contains a plaque in English and Spanish; the southern side of the obelisk presumably contains a plaque in Spanish.