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
From the 2000 census to the 2010 census, the population increased to 12,382, about four times the population in 2000. As of 2011 90% of the residents are Asian Americans, African-Americans, and Latino Americans. Between the 2000 and 2010 censuses, the number of White Americans increased while the percentage of Whites decreased. Jeannie Kever of the "Houston Chronicle" said that "not all of the newcomers identify with the old neighborhood and its inhabitants, even those living just a block away."