Marengo County Alabama (Vacant / Not In Use) has 7 places on the National Register of Historic Places including 1 place of National significance and 2 places of Statewide significance. Significant places include Gaineswood, Demopolis Public School and Half-Chance Bridge, Allen Grove and Cedar Haven.
Some of the country's most noteable architects helped create the Marengo County places including Nathan Bryan Whitfield, King Iron Bridge Manufacturing Co., Frank Lockwood, Clancy & Neely and David Rudisill. Prominent architectural styles found in Marengo Country are Greek Revival and Beaux Arts.