Four Corners (disambiguation)
Four Corners is a region in the southwestern United States where the corners of Colorado, Utah, New Mexico and Arizona meet.
Quadripoint
In Mexico there is one precise quadripoint at . The "Mojonera de los cuatro estados" ("Four State Boundary Stone") was built to mark the point where Coahuila, Nuevo Leon, San Luis Potosi, and Zacatecas states effectively meet.