Miller County Arkansas (Vacant / Not In Use)  has 6 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Texarkana Union Station, Adams, Wallace, Service Station, Buhrman--Pharr Hardware Company Historic District, Ritchie Grocery Building and Swift Building. 
Some of the country's most noteable architects helped create the Miller County places including E.M. Tucker, A.B. Butterworth,  Seibert & Halsey Witt and  McGuire & Cavender. Prominent architectural styles found in Miller Country are Early Commercial, Renaissance and  Romanesque.