Four Corners Monument
The Four Corners Monument marks the quadripoint in the Southwestern United States where the states of Arizona, Colorado, New Mexico, and Utah meet. It is the only point in the United States shared by four states, leading to the area being named the Four Corners region. The monument also marks the boundary between two semi-autonomous Native American governments, the Navajo Nation, which maintains the monument as a tourist attraction, and the Ute Mountain Ute Tribe Reservation.
32nd meridian west from Washington
These boundaries on the 32nd meridian of longitude west from Washington remained when Colorado became a state on August 1, 1876, Utah became a state on January 4, 1896, New Mexico became a state on January 6, 1912, and Arizona became a state on February 14, 1912. The point of intersection of these four states, known as the Four Corners, is the only place in the United States where four states touch.