Quadripoint
The Four Corners Monument is the only point in the United States where four states meet: Colorado, Utah, New Mexico, and Arizona meet at right angles. The United States first acquired the area now called Four Corners from Mexico after the Mexican–American War in 1848. In 1863 Congress created Arizona Territory from the western part of New Mexico Territory. The boundary was defined as a line running due south from the southwest corner of Colorado Territory, which had been created in 1861. By defining one boundary as starting at the corner of another Congress ensured the eventual creation of four states meeting at a point, regardless of the inevitable errors of boundary surveying. The monument is centered at .
Four Corners, Texas
The original community was centered on the four-way intersection of Boss Gaston, Old Richmond, and Richmond Gaines roads. The census-designated place as of 2011 includes the crossroads and several new houses west of Texas State Highway 6, north of McKaskle Road, and south of Riverside Grove Drive and Stanbridge Drive. Journalist Jeannie Kever said that the community, once "isolated", had become "something bigger and harder to define, its aging small frame houses and mobile homes engulfed by the omnivorous spoils of growth."