November 26, 2011

The 225-foot milldam shown in the distance near the tall building is holding back the waters of Mammoth Spring, Arkansas’s largest spring and the seventh largest in the United States. At one time, the two stone buildings housed a flour mill and later a hydroelectric power plant, neither of which is now operational. The area was designated a state park in 1957, but no land was acquired until 1966. The modern building to the left of the former hydroelectric plant is the state’s tenth Arkansas Welcome Center, which opened in 1987.