Are yams and sweet potatoes the same?
city, Mercer county, extreme southern tip of West Virginia, U.S., lying in the Blue Ridge Mountains. It is adjacent to the town of Bluefield in Tazewell county, Virginia. Situated at the foot of East River Mountain, it is one of the highest cities (elevation 2,612 feet [796 metres]) in the United States east of the Rocky Mountains. Bluefield is known as "Nature's Air-Conditioned City" due to its unusually cool summer climate