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.
8 Mile Corner
8 Mile Corner is a monument in the Cimarron National Grassland dedicated to the tri-point (a place where three states meet) of Kansas, Colorado, and Oklahoma. This point is also the meeting point for three distinct regions of America - the Western United States (Colorado), Midwestern United States (Kansas), and South Central United States (Oklahoma). The landmark is a windmill with the three states' abbreviated names on the blades. The windmill monument was built in 1903. In 1990, satellite images showed the actual meeting place to be several feet away from the monument. A brass plate in the ground marks this. The site is approximately west of Elkhart, Kansas on mostly unpaved State Line Road.