Keywords: Monument marking the Initial Point of Boundary Between U.S. and Mexico (1974 photo).jpg en Monument marking the Initial Point of Boundary Between U S and Mexico 1973 photo es Monumento en el punto inicial de la frontera entre los Estados Unidos de América y México foto de 1973 74000550 1973-03-21 http //pdfhost focus nps gov/docs/NRHP/Photos/74000550 pdf national park service PD-USGov Uploaded with UploadWizard Border crossing in Tijuana Border Field State Park Beaches of Tijuana B C Boundary stones of the Mexico “United States border |