That’s the Four Corners Monument for us. This is the only place where four states (Arizona, Colorado, New Mexico and Utah) meet at a corner and you can actually stand in all four states at one time if you place your feet just so. The monument also marks the boundary between two native American governments, The Navajo Nation and the Ute Mountain Indian Reservation.
The origins of the state boundaries marked by the monument occurred during the American Civil War, when Congress acted to form governments in the area to combat Confederate forces. Claims are sometimes made that the monument was misplaced in the initial surveys; however, the monument has been legally established as the corner of the four states.
Like I said: Been there, done that.