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 Mile Circle
Four Mile Circle is a traffic circle in the U.S. state of New Jersey. It is located at the junction of Route 70, Route 72, Buddtown Road (County Route 644), and New Lisbon Road (County Route 646). This junction is in Woodland Township, within the New Jersey Pine Barrens, near Southampton and Pemberton Townships.