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 States Arena
The Four States Arena is a 5,600-seat multi-purpose arena in Texarkana, Arkansas. Built in 1985, the venue is located at the Four States Fairgrounds which is within the limits of Bobby Ferguson Park. The arena has been home to the Central Hockey League's Border City Bandits (2000–2001) and a North American Hockey League team sharing the same nickname, the Texarkana Bandits (2003–2006). Through the years, The Four States Arena has hosted many entertainers performing concerts along with a number of annual and seasonal events each year including the rodeo at the Four States Fair each September and the holiday-themed "Mistletoe Fair" in either November or December.