At the heart of the Four Corners Monument in the southwestern United States lies a rare geographic marvel: the exact point where Utah, Colorado, New Mexico, and Arizona meet. This spot is the only quadripoint in the country—where four state borders unite at a single point—and is marked by a granite and brass disk inset in a plaza . Constructed initially with sandstone in the late 1800s and later rebuilt with granite and bronze by the Navajo Nation and Bureau of Land Management, the monument w.