Monument Valley (Navajo: Tsé Biiʼ Ndzisgaii, meaning Valley of the Rocks) is a region of the Colorado Plateau characterized by a cluster of red-sandstone buttes, the largest reaching 1,000 ft above the valley floor.   It is located on the Utah-Arizona state line, near the Four Corners area. The valley is a sacred area that lies within the territory of the Navajo Nation, the Native American people of the area.  The Navajo Tribal Park is accessed by the looping, 17-mile Valley Drive. The famous, steeply sloped Mittens buttes can be viewed from the road or from overlooks such as John Ford’s Point. Monument Valley has been featured in many forms of media since the 1930s. Director John Ford used the location for a number of his Westerns; critic Keith Phipps wrote that "its five square miles have defined what decades of moviegoers think of when they imagine the American West."