The geographical point where the states of Colorado, Utah, New Mexico, and Arizona meet. This is the only place in the U.S. where you can stand, sit, lie, or whatever in four states at once. Controversy surrounds the position of the monument. The borders between the four states were surveyed and marked around the time of the civil war. Although they do not follow the original intended borders perfectly, the Supreme Court ruled that they supersede the original descriptions of the boundaries, and have now become the legal borders between the states. Interestingly enough, the only practical way to get to the monument is from US-160 in the northwestern tip of New Mexico, but you can only get there through Arizona or Colorado. A number of stall surround the monument where various (usually Native American) vendors sell goods ranging from four corners souvenirs to authentic homemade arrow heads, knives, jewelry, blankets, etc.